Standard Lemma guide

unreasonably

adv · 4 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.

  • ŭn-rēʹ-zən-ə-blē
  • /ʌnˈɹiː.zən.ə.bli/
  • /ʌnˈɹiː.z.nə.bli/
  • Southern-England: Recorded audio is listed in the source snapshot.
  • rhymes with -iːzənəbli
  • CMU ARPABET: AH0 N R IY1 Z AH0 N AH0 B L IY0 Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

adv

Meaning 1

In an unreasonable manner.

Definition source: English Wiktionary via Wiktextract

Examples

  • He behaved unreasonably.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

adv

Meaning 2

To an unreasonable degree.

Definition source: English Wiktionary via Wiktextract

Examples

  • The team was given an unreasonably short amount of time to put together a presentation.
  • 1737, Jonathan Swift, Letter to Alderman Barber dated 30 March, 1737, in The Works of Dr Jonathan Swift, Edinburgh: J. Balfour, 1766, Volume 11, p. 126, Thus bishops, deans, and chapters, as well as other corporations, seldom or never let their lands even so high as half the value; and when they raise those rents which are unreasonably low, it is by degrees.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

adverb

Meaning 3

to a degree that exceeds the bounds or reason or moderation

Definition source: Princeton WordNet 3.0

Examples

  • his prices are unreasonably high

Meaning relationships

Synonyms: immoderately

Antonyms: reasonably

4

adverb

Meaning 4

not in a reasonable or intelligent manner

Definition source: Princeton WordNet 3.0

Examples

  • she reacted unreasonably when she learned she had failed

Meaning relationships

Synonyms: none provided

Antonyms: reasonably

History

Etymology

From Middle English unresonably, equivalent to unreasonable + -ly, after resonably (whence reasonably) and (originally) Late Latin irratiōnābiliter.

Across languages

Translations

4 source translations are retained for this English entry.

  • French: déraisonnablement — in an unreasonable manner
  • Portuguese: irracionalmente — in an unreasonable manner
  • Swedish: orimligt — to an unreasonable degree
  • Swedish: orealistiskt — to an unreasonable degree