Standard Lemma guide

unreliable

adj · noun · 6 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.

  • Received-Pronunciation: /ˌʌn.ɹɪˈlaɪ.ə.bl̩/
  • Received-Pronunciation: /ʌn.ɹɪˈlaɪ.ə.bl̩/
  • General-American: /ˌʌn.ɹəˈlaɪ.ə.bəl/
  • US: Recorded audio is listed in the source snapshot.
  • rhymes with -aɪəbəl
  • CMU ARPABET: AH2 N R IH0 L AY1 AH0 B AH0 L Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.
  • CMU ARPABET 2: AH2 N R IY0 L AY1 AH0 B AH0 L Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

adj

Meaning 1

Not reliable.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: flakey, sporadic, undependable

Antonyms: reliable

2

noun

Meaning 2

One who or that which cannot be relied upon.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

adjective

Meaning 3

not worthy of reliance or trust

Definition source: Princeton WordNet 3.0

Examples

  • in the early 1950s computers were large and expensive and unreliable
  • an undependable assistant

Meaning relationships

Synonyms: undependable

Antonyms: reliable

4

adjective satellite

Meaning 4

liable to be erroneous or misleading

Definition source: Princeton WordNet 3.0

Examples

  • an undependable generalization

Meaning relationships

Synonyms: undependable

Antonyms: none provided

5

adjective satellite

Meaning 5

lacking a sense of responsibility

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

6

adjective satellite

Meaning 6

dangerously unstable and unpredictable

Definition source: Princeton WordNet 3.0

Examples

  • treacherous winding roads
  • an unreliable trestle

Meaning relationships

Synonyms: treacherous

Antonyms: none provided

History

Etymology

From un- + reliable.

Across languages

Translations

56 source translations are retained for this English entry.

  • Albanian: i pasigurt — not reliable
  • Azerbaijani: etibarsız — not reliable
  • Basque: ganoragabe — not reliable
  • Basque: ganorabako — not reliable
  • Belarusian: ненадзе́йны (njenadzjéjny) — not reliable
  • Bulgarian: ненадежден (nenadežden) — not reliable
  • Chinese Mandarin: 不可靠的 — not reliable
  • Czech: nespolehlivý — not reliable
  • Danish: upålidelig — not reliable
  • Dutch: onbetrouwbaar — not reliable
  • Esperanto: nefidinda — not reliable
  • Finnish: epäluotettava — not reliable
  • French: non fiable — not reliable
  • French: à qui on ne peut pas se fier — not reliable
  • German: unzuverlässig — not reliable
  • Greek: αναξιόπιστος (anaxiópistos) — not reliable
  • Haitian Creole: infidèl — not reliable
  • Hungarian: megbízhatatlan — not reliable
  • Icelandic: óáreiðanlegur — not reliable
  • Irish: abhógach — not reliable
  • Irish: ainfhéichiúnta — not reliable
  • Irish: feillbhéasach — not reliable
  • Irish: neamhchoinníollach — not reliable
  • Irish: neamhiontaofa — not reliable
  • Irish: neamh-mhuiníneach — not reliable
  • Italian: inaffidabile — not reliable
  • Kazakh: сенімсіз (senımsız) — not reliable
  • Kazakh: тұрақсыз (tūraqsyz) — not reliable
  • Macedonian: недо́верлив (nedóverliv) — not reliable
  • Macedonian: нена́дежен (nenádežen) — not reliable
  • Macedonian: неси́гурен (nesíguren) — not reliable
  • Māori: kahurakiraki — not reliable
  • Māori: māngina — not reliable
  • Māori: hārakiraki — not reliable
  • Māori: hurori — not reliable
  • Māori: kōnukenuke — not reliable
  • Māori: kahurangi — not reliable
  • Māori: mōngina — not reliable
  • Māori: hārekereke — not reliable
  • Norwegian Bokmål: upålitelig — not reliable
  • Norwegian Nynorsk: upåliteleg — not reliable
  • Plautdietsch: onbestendich — not reliable
  • Polish: nierzetelny — not reliable
  • Polish: awaryjny — not reliable
  • Portuguese: não confiável — not reliable
  • Portuguese: inconfiável — not reliable
  • Russian: ненадёжный (nenadjóžnyj) — not reliable
  • Russian: неблагонадёжный (neblagonadjóžnyj) — not reliable
  • Serbo-Croatian: nepouzdan — not reliable
  • Spanish: no / poco / nada fiable / confiable — not reliable
  • Swedish: opålitlig — not reliable
  • Tocharian B: empakwatte — not reliable
  • Turkish: güvenilmez — not reliable
  • Ukrainian: ненаді́йний (nenadíjnyj) — not reliable
  • Welsh: gwantan — not reliable
  • Welsh: annibynadwy — not reliable
Real reading context

unreliable in complete knowledge articles