unreasonably.
In an unreasonable manner.
Meaning & usage
In an unreasonable manner.
He behaved unreasonably.
To an unreasonable degree.
The team was given an unreasonably short amount of time to put together a presentation.
Where this word comes from
From Middle English unresonably, equivalent to unreasonable + -ly, after resonably (whence reasonably) and (originally) Late Latin irratiōnābiliter.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.