Standard Lemma guide

mendacity

noun · 3 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: /mɛnˈdæsəti/
  • Southern-England: Recorded audio is listed in the source snapshot.
  • General-American: /mɛnˈdæsəti/
  • General-American: [-ɾi]
  • CMU ARPABET: M EH0 N D AE1 S IH0 T IY0 Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

noun

Meaning 1

The fact or condition of being untruthful; dishonesty.

Definition source: English Wiktionary via Wiktextract

Usage: uncountable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

A deceit, falsehood, or lie.

Definition source: English Wiktionary via Wiktextract

Usage: countable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

the tendency to be untruthful

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: veracity

Broader terms: untruthfulness

History

Etymology

From Late Latin mendacitas, from Latin mendāx (“deceitful, deceptive, lying”) + -itās (suffix forming nouns indicating a state of being). Mendāx is derived from mentior (“to deceive, lie”) (from mēns, mentis (“mind; intellect; judgment, reasoning”), from Proto-Indo-European *méntis (“thought”)) + -āx (suffix forming adjectives expressing a tendency or inclination), or from Proto-Indo-European *mend- (“to fault”). By surface analysis, Latin mendāc- + -ity.

Across languages

Translations

34 source translations are retained for this English entry.

  • Bulgarian: лъжливост (lǎžlivost) — fact or condition of being untruthful; dishonesty
  • Danish: uhæderlighed — fact or condition of being untruthful; dishonesty
  • Danish: løgnagtighed — fact or condition of being untruthful; dishonesty
  • Dutch: leugenachtigheid — fact or condition of being untruthful; dishonesty
  • Dutch: oneerlijkheid — fact or condition of being untruthful; dishonesty
  • Finnish: valheellisuus — fact or condition of being untruthful; dishonesty
  • Finnish: epärehellisyys — fact or condition of being untruthful; dishonesty
  • German: Verlogenheit — fact or condition of being untruthful; dishonesty
  • Italian: mendacità — fact or condition of being untruthful; dishonesty
  • Norwegian: uærlighet — fact or condition of being untruthful; dishonesty
  • Portuguese: mendacidade — fact or condition of being untruthful; dishonesty
  • Portuguese: falsidade — fact or condition of being untruthful; dishonesty
  • Russian: лжи́вость (lžívostʹ) — fact or condition of being untruthful; dishonesty
  • Spanish: mendacidad — fact or condition of being untruthful; dishonesty
  • Turkish: yalancılık — fact or condition of being untruthful; dishonesty
  • Ottoman Turkish: یالانجیلق (yalancılık) — fact or condition of being untruthful; dishonesty
  • Bulgarian: лъжа (lǎža) — a deceit, falsehood, or lie
  • Dutch: leugen — a deceit, falsehood, or lie
  • Dutch: bedrog — a deceit, falsehood, or lie
  • Finnish: valhe — a deceit, falsehood, or lie
  • Finnish: petos — a deceit, falsehood, or lie
  • Finnish: vilppi — a deceit, falsehood, or lie
  • German: Unwahrheit — a deceit, falsehood, or lie
  • Italian: bugia — a deceit, falsehood, or lie
  • Italian: menzogna — a deceit, falsehood, or lie
  • Italian: falsità — a deceit, falsehood, or lie
  • Italian: mendacità — a deceit, falsehood, or lie
  • Norwegian: falskhet — a deceit, falsehood, or lie
  • Portuguese: mendacidade — a deceit, falsehood, or lie
  • Portuguese: falsidade — a deceit, falsehood, or lie
  • Romanian: falsitate — a deceit, falsehood, or lie
  • Russian: ложь (ložʹ) — a deceit, falsehood, or lie
  • Russian: фальшь (falʹšʹ) — a deceit, falsehood, or lie
  • Spanish: mentira — a deceit, falsehood, or lie