Standard Lemma guide

invariable

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.

  • General-American: /ɪnˈvɛɹ.i.ə.bl̩/
  • Received-Pronunciation: /ɪnˈvɛə.ɹi.ə.bl̩/
  • Texas, obsolete, possibly: /ɪnˈvɛɚbl̩/
  • US: Recorded audio is listed in the source snapshot.
  • CMU ARPABET: IH2 N V EH1 R IY0 AH0 B AH0 L Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

adj

Meaning 1

Not variable; unalterable; uniform; always having the same value.

Definition source: English Wiktionary via Wiktextract

Usage: not-comparable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

adj

Meaning 2

Constant.

Definition source: English Wiktionary via Wiktextract

Usage: not-comparable

Topics: mathematics, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

adj

Meaning 3

That cannot undergo inflection, conjugation or declension.

Definition source: English Wiktionary via Wiktextract

Usage: broadly, not-comparable

Qualifier: or a grammatical class

Topics: grammar, human-sciences, linguistics, sciences

Examples

  • The French adjective marron ‘brown’ is invariable: it does not take the usual s in the plural.

Meaning relationships

Synonyms: uninflectable

Antonyms: none provided

4

noun

Meaning 4

Something that does not vary; a constant.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

5

adjective

Meaning 5

not liable to or capable of change

Definition source: Princeton WordNet 3.0

Examples

  • an invariable temperature
  • an invariable rule
  • his invariable courtesy

Meaning relationships

Synonyms: none provided

Antonyms: variable

6

noun

Meaning 6

a quantity that does not vary

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: constant, constant quantity

Antonyms: none provided

Broader terms: quantity

Narrower terms: parameter, parametric quantity

History

Etymology

Etymology tree Proto-Indo-European *né Proto-Indo-European *n̥- Proto-Italic *n̥- Latin in-bor. Middle English in- English in- English variable English invariable From in- + variable.

Across languages

Translations

39 source translations are retained for this English entry.

  • Bulgarian: неизменя́ем (neizmenjáem) — not variable
  • Bulgarian: неизменен (neizmenen) — not variable
  • Catalan: invariable — not variable
  • Danish: uforanderlig — not variable
  • Dutch: onveranderlijk — not variable
  • Finnish: muuttumaton — not variable
  • French: invariable — not variable
  • Georgian: არაცვლადი (aracvladi) — not variable
  • Georgian: უცვლელი (ucvleli) — not variable
  • Georgian: მუდმივი (mudmivi) — not variable
  • Georgian: შეუცვლელი (šeucvleli) — not variable
  • German: unveränderlich — not variable
  • Greek: άκλιτος (áklitos) — not variable
  • Irish: do-athraitheach — not variable
  • Italian: invariabile — not variable
  • Manx: neuchaghlaaee — not variable
  • Manx: kinjagh — not variable
  • Manx: shassooagh — not variable
  • Norman: învâriabl'ye — not variable
  • Norwegian Bokmål: ubøyelig — not variable
  • Polish: niezmienny — not variable
  • Polish: stały — not variable
  • Portuguese: invariável — not variable
  • Romanian: invariabil — not variable
  • Romanian: invariabilă — not variable
  • Romanian: nevariabil — not variable
  • Romanian: neschimbabil — not variable
  • Russian: неизме́нный (neizménnyj) — not variable
  • Russian: неизменя́емый (neizmenjájemyj) — not variable
  • Spanish: invariable — not variable
  • Spanish: ejecutorio — not variable
  • Swedish: oföränderlig — not variable
  • Telugu: మార్పులేని (mārpulēni) — not variable
  • Telugu: జిడ్డుగాడు (jiḍḍugāḍu) — not variable
  • Ukrainian: незмінний (nezminnyj) — not variable
  • Bulgarian: постоянен (postojanen) — (mathematics) constant
  • Bulgarian: константен (konstanten) — (mathematics) constant
  • Ukrainian: постійний (postijnyj) — (mathematics) constant
  • Ukrainian: сталий (stalyj) — (mathematics) constant