Standard Lemma guide

strengthen

verb · 9 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • /ˈstɹɛŋ(k)θən/
  • /ˈstɹɛnθən/
  • [ˈstɹeɪŋ(k)θən] pre-/ŋ/ tensing
  • US: Recorded audio is listed in the source snapshot.
  • rhymes with -ɛŋkθən
  • CMU ARPABET: S T R EH1 NG TH AH0 N Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

verb

Meaning 1

To make strong or stronger; to add strength to; to increase the strength of; to fortify.

Definition source: English Wiktionary via Wiktextract

Usage: transitive

Examples

  • strengthen a muscle
  • strengthen a wall
  • strengthen one's willpower
  • strengthen one's authority

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

verb

Meaning 2

To empower; to give moral strength to; to encourage; to enhearten.

Definition source: English Wiktionary via Wiktextract

Usage: transitive

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

verb

Meaning 3

To augment; to improve; to intensify.

Definition source: English Wiktionary via Wiktextract

Usage: transitive

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

verb

Meaning 4

To reinforce, to add to, to support (someone or something)

Definition source: English Wiktionary via Wiktextract

Usage: transitive

Examples

  • strengthen an army

Meaning relationships

Synonyms: none provided

Antonyms: none provided

5

verb

Meaning 5

To substantiate; to corroborate (a belief, argument, etc.)

Definition source: English Wiktionary via Wiktextract

Usage: transitive

Examples

  • strengthen the cause

Meaning relationships

Synonyms: none provided

Antonyms: none provided

6

verb

Meaning 6

To grow strong or stronger.

Definition source: English Wiktionary via Wiktextract

Usage: intransitive

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

7

verb

Meaning 7

give a healthy elasticity to

Definition source: Princeton WordNet 3.0

Examples

  • Let's tone our muscles

Meaning relationships

Synonyms: tone, tone up

Antonyms: none provided

Broader terms: exercise, work out

8

verb

Meaning 8

gain strength

Definition source: Princeton WordNet 3.0

Examples

  • His body strengthened

Meaning relationships

Synonyms: none provided

Antonyms: weaken

Broader terms: change

Narrower terms: consolidate, proof, back, sandbag, toughen

9

verb

Meaning 9

make strong or stronger

Definition source: Princeton WordNet 3.0

Examples

  • This exercise will strengthen your upper body
  • strengthen the relations between the two countries

Meaning relationships

Synonyms: beef up, fortify

Antonyms: weaken

Broader terms: change, alter, modify

Narrower terms: vitalize, vitalise, ruggedize, ruggedise, substantiate, restrengthen, undergird, brace up, confirm, reinforce, reenforce, buttress, brace, steady, stabilize, stabilise, batten, batten down, secure

History

Etymology

From rare Middle English strengthenen (14th c.), from earlier strengthen (12th c.), where -en is the infinitive ending. Probably the original form was reinterpreted as strength + -en around the time when the infinitive ending was being apocopated in late Middle English.

Across languages

Translations

134 source translations are retained for this English entry.

  • Afrikaans: versterk — to make strong or stronger
  • Albanian: forcoj — to make strong or stronger
  • Arabic: قَوَّى (qawwā) — to make strong or stronger
  • Arabic: عَزَّزَ (ʕazzaza) — to make strong or stronger
  • Aragonese: fortaleixer — to make strong or stronger
  • Aragonese: fortalexer — to make strong or stronger
  • Aragonese: enfortir — to make strong or stronger
  • Armenian: զորացնել (zoracʻnel) — to make strong or stronger
  • Armenian: ուժեղացնել (užeġacʻnel) — to make strong or stronger
  • Bulgarian: уси́лвам (usílvam) — to make strong or stronger
  • Catalan: enfortir — to make strong or stronger
  • Catalan: reforçar — to make strong or stronger
  • Cherokee: ᎠᏍᏓᏱᏗᎠ (asdayidia) — to make strong or stronger
  • Chinese Mandarin: 加強 /加强 (jiāqiáng) — to make strong or stronger
  • Crimean Tatar: pekitmek — to make strong or stronger
  • Czech: posílit — to make strong or stronger
  • Dutch: versterken — to make strong or stronger
  • Esperanto: fortigi — to make strong or stronger
  • Esperanto: plifortigi — to make strong or stronger
  • Estonian: tugevdama — to make strong or stronger
  • Finnish: vahvistaa — to make strong or stronger
  • French: renforcer — to make strong or stronger
  • French: affermir — to make strong or stronger
  • French: raffermir — to make strong or stronger
  • French: fortifier — to make strong or stronger
  • Galician: fortalecer — to make strong or stronger
  • Georgian: გაძლიერება (gaʒliereba) — to make strong or stronger
  • Georgian: გამაგრება (gamagreba) — to make strong or stronger
  • German: verstärken — to make strong or stronger
  • German: stärken — to make strong or stronger
  • Greek: ενισχύω (enischýo) — to make strong or stronger
  • Ancient Greek: ἰσχυρόω (iskhuróō) — to make strong or stronger
  • Ancient Greek: ῥώννυμι (rhṓnnumi) — to make strong or stronger
  • Hawaiian: hoʻoikaika — to make strong or stronger
  • Hebrew: חִזֵּק (khizék) — to make strong or stronger
  • Hindi: दृढ़ाना (dŕṛhānā) — to make strong or stronger
  • Hungarian: megerősít — to make strong or stronger
  • Hungarian: erősít — to make strong or stronger
  • Ido: fortigar — to make strong or stronger
  • Ingrian: vahvistaa — to make strong or stronger
  • Ingrian: vahventaa — to make strong or stronger
  • Ingrian: vahvenoittaa — to make strong or stronger
  • Ingrian: vahvita — to make strong or stronger
  • Ingrian: vahvissuttaa — to make strong or stronger
  • Irish: neartaigh — to make strong or stronger
  • Italian: rinforzare — to make strong or stronger
  • Italian: rafforzare — to make strong or stronger
  • Italian: corroborare — to make strong or stronger
  • Japanese: 強くする (tsuyoku suru) — to make strong or stronger
  • Japanese: 強める (tsuyomeru) — to make strong or stronger
  • Kannada: ಬಲಗೊಳ್ಳು (balagoḷḷu) — to make strong or stronger
  • Ladino: enfuerteser — to make strong or stronger
  • Ladino: enforteser — to make strong or stronger
  • Ladino: enreziar — to make strong or stronger
  • Ladino: arreziar — to make strong or stronger
  • Latin: rōborō — to make strong or stronger
  • Latin: corrōborō — to make strong or stronger
  • Latin: firmō — to make strong or stronger
  • Latvian: stiprināt — to make strong or stronger
  • : ᦶᦏᧄᦶᦃᧂᦶᦣᧂ (ṫhaemẋaenghaeng) — to make strong or stronger
  • Māori: whakakaha — to make strong or stronger
  • Māori: whakamarohi — to make strong or stronger
  • Middle English: strengthen — to make strong or stronger
  • Polish: wzmacniać — to make strong or stronger
  • Polish: wzmocnić — to make strong or stronger
  • Polish: pokrzepiać — to make strong or stronger
  • Portuguese: fortalecer — to make strong or stronger
  • Portuguese: reforçar — to make strong or stronger
  • Romanian: întări — to make strong or stronger
  • Russian: уси́ливать (usílivatʹ) — to make strong or stronger
  • Russian: уси́лить (usílitʹ) — to make strong or stronger
  • Serbo-Croatian: оја̀чати — to make strong or stronger
  • Serbo-Croatian: ojàčati — to make strong or stronger
  • Spanish: fortalecer — to make strong or stronger
  • Spanish: fortificar — to make strong or stronger
  • Spanish: reforzar — to make strong or stronger
  • Swedish: förstärka — to make strong or stronger
  • Swedish: stärka — to make strong or stronger
  • Tagalog: lakasan — to make strong or stronger
  • Tok Pisin: strongim — to make strong or stronger
  • Turkish: güçlendirmek — to make strong or stronger
  • Turkish: kuvvetlendirmek — to make strong or stronger
  • Welsh: cryfhau — to make strong or stronger
  • Dutch: bezielen — to animate
  • Dutch: tot leven wekken — to animate
  • Dutch: versterken — to animate
  • Finnish: vahvistaa — to animate
  • Finnish: innostaa — to animate
  • French: fortifier — to animate
  • German: bestärken — to animate
  • German: stärken — to animate
  • Italian: animare — to animate
  • Latin: animo — to animate
  • Middle English: strengthen — to animate
  • Serbo-Croatian: potàknuti — to animate
  • Serbo-Croatian: osokòliti — to animate
  • Spanish: animar — to animate
  • Swahili: kuimarisha — to animate
  • Turkish: yüreklendirmek — to animate
  • Bulgarian: засилвам (zasilvam) — to augment
  • Dutch: kracht geven — to augment
  • Finnish: vahvistaa — to augment
  • Finnish: voimistaa — to augment
  • German: verstärken — to augment
  • Italian: intensificare — to augment
  • Italian: aumentare — to augment
  • Latin: augeo — to augment
  • Māori: whakamarohi — to augment
  • Middle English: strengthen — to augment
  • Turkish: pekiştirmek — to augment
  • Armenian: ամրանալ (amranal) — to grow strong or stronger
  • Bulgarian: усилвам се (usilvam se) — to grow strong or stronger
  • Finnish: vahvistua — to grow strong or stronger
  • Finnish: voimistua — to grow strong or stronger
  • German: stärker werden — to grow strong or stronger
  • Hungarian: megerősödik — to grow strong or stronger
  • Hungarian: erősödik — to grow strong or stronger
  • Ingrian: ramoittua — to grow strong or stronger
  • Ingrian: voimistua — to grow strong or stronger
  • Ingrian: vahveta — to grow strong or stronger
  • Ingrian: vahvistua — to grow strong or stronger
  • Italian: rinforzarsi — to grow strong or stronger
  • Italian: rafforzarsi — to grow strong or stronger
  • Latin: firmor — to grow strong or stronger
  • Polish: wzmacniać się — to grow strong or stronger
  • Polish: wzmocnić się — to grow strong or stronger
  • Polish: stawać się mocniejszym — to grow strong or stronger
  • Polish: stawać się coraz silniejszym — to grow strong or stronger
  • Romanian: deveni mai puternic — to grow strong or stronger
  • Serbo-Croatian: оја̀чати — to grow strong or stronger
  • Serbo-Croatian: ojàčati — to grow strong or stronger
  • Tok Pisin: strongim — to grow strong or stronger
  • Turkish: güçlenmek — to grow strong or stronger
  • Turkish: kuvvetlenmek — to grow strong or stronger
Real reading context

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