unsleepy

C2+ Topic:Describing Qualities

US /ʌnˈslipi/ UK /ʌnˈsliːpi/ See IPA manual

adj

Meanings

1

adj
not drowsy; wakeful

Despite the late hour she felt oddly unsleepy.

Thesaurus

Synonyms

1 adj · not drowsy; wakeful wakeful alert awake sleeplesswide-awake

Opposites

sleepy drowsy somnolent tired

Word family

Related forms sleep sleepy asleep

Etymology

From un- ('not') + sleepy, from sleep, from Old English slǣp ('sleep'), from Proto-Germanic *slēpaz.

un- Old English slǣp Old English *slēpaz Proto-Germanic

View etymology graph ->

Topics

Describing Qualities Word Formation & Derivatives

# unsleepy

**Type:** Word
**Level:** C2+
**Part of speech:** adj
**IPA (US):** ʌnˈslipi
**IPA (UK):** ʌnˈsliːpi

## Meanings
1. not drowsy; wakeful

## Examples
- Despite the late hour she felt oddly unsleepy.

## Synonyms
- wakeful
- alert
- awake
- sleepless
- wide-awake

## Antonyms
- sleepy
- drowsy
- somnolent
- tired

## Related Forms
- sleep
- sleepy
- asleep

## Roots and Affixes
- Root: un-
- Root: slǣp
- Root: *slēpaz

## Etymology
From un- ('not') + sleepy, from sleep, from Old English slǣp ('sleep'), from Proto-Germanic *slēpaz.

## AI Etymology
Unsleepy comes from un- ('not') + sleepy, from sleep, from Old English slǣp ('sleep'), from Proto-Germanic *slēpaz. In current use it is an adjective meaning "not drowsy; wakeful". 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 surface form is compositional: its joined elements remain visible in the modern word. The historical chain includes Old English un-, Old English slǣp, and Proto-Germanic *slēpaz. Related English forms include sleep, sleepy, and asleep. 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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unsleepy

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