Where does “sleeplessness” come from?

Sleeplessness comes from Middle English sleepnesse, from Old English slēplēas combined with the suffix -nes, ultimately derived from Proto-Germanic -inassuz and -inōną.

sleeplessness (English): Lack of sleep; the property of being sleepless

Definitions

  1. Lack of sleep; the property of being sleepless

Ancestry of “sleeplessness”, step by step

StepLanguageWordMeaning
1English-nessAppended to adjectives to form nouns meaning "the...
2Middle English-nesseAffixed to adjectives to form abstract nouns...
3Old English-nesUsed to form abstract nouns, usually from...
4Proto-West Germanic-nassīUsed to form abstract nouns, usually from...
5Proto-Germanic-inassuz-ness
6Proto-West Germanic-ness, -th
7Proto-Germanic-į̄-th
8Proto-Indo-European-íh₂
9Proto-Indo-European-h₂Creates collective nouns, which refer to groups...
Every word from Proto-Indo-European -h₂Every word from English -nessEvery word from Old English -nes