unreasonably

C2+ Topic:Describing Qualities

US /ʌnˈriznəbli/ UK /ʌnˈriːznəbli/ See IPA manual

adv

Meanings

1

adv
to an excessive or irrational degree

The landlord raised the rent unreasonably high.

Thesaurus

Synonyms

1 adv · to an excessive or... irrationallyexcessively unduly absurdly extravagantly

Opposites

reasonably rationally fairly moderately

Word family

Related forms reason reasonable unreasonable unreasonableness

Etymology

From unreasonable + -ly, from un- ('not') + reasonable, from reason, from Latin ratio ('reckoning, reason'), from reri ('to reckon, think').

un- Old English ratio Latin

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Topics

Describing Qualities Word Formation & Derivatives

# unreasonably

**Type:** Word
**Level:** C2+
**Part of speech:** adv
**IPA (US):** ʌnˈriznəbli
**IPA (UK):** ʌnˈriːznəbli

## Meanings
1. to an excessive or irrational degree

## Examples
- The landlord raised the rent unreasonably high.

## Synonyms
- irrationally
- excessively
- unduly
- absurdly
- extravagantly

## Antonyms
- reasonably
- rationally
- fairly
- moderately

## Related Forms
- reason
- reasonable
- unreasonable
- unreasonableness

## Roots and Affixes
- Root: un-
- Root: ratio

## Etymology
From unreasonable + -ly, from un- ('not') + reasonable, from reason, from Latin ratio ('reckoning, reason'), from reri ('to reckon, think').

## AI Etymology
Unreasonably comes from unreasonable + -ly, from un- ('not') + reasonable, from reason, from Latin ratio ('reckoning, reason'), from reri ('to reckon, think'). In current use it is an adverb meaning "to an excessive or irrational degree". That sense is explained by the older material without requiring a speculative semantic step: the inherited or borrowed base supplies the field of meaning, while the English formation fixes its modern role. The prefix un- is negative or privative, marking the absence, denial, or opposite of the base idea. The final -ly makes the underlying adjective or participial form adverbial. The surface form is compositional: its joined elements remain visible in the modern word. The historical chain includes Old English un- and Latin ratio. Related English forms include reason, reasonable, unreasonable, and unreasonableness. As a result, the modern word is best read as a negative, privative, or reversative formation built on a historically older base.

## Topics
- Describing Qualities
- Word Formation & Derivatives

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unreasonably

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