Where does “kittening” come from?

kittening (English) comes from English ing, from Middle English ing, from Old English ing, from Old Norse eng, from Proto-Germanic angijō, from Proto-Indo-European h₂énkos, from Proto-Indo-European -os — Creates action nouns or result nouns from verbs;...

kittening (English): The giving birth of kittens; present participle...

Definitions

  1. The giving birth of kittens; present participle...

Ancestry of “kittening”, step by step

kittening traces back through two separate lines of ancestry.

via English ing

StepLanguageWordMeaning
1EnglishingA meadow, especially a low meadow near a river;...
2Middle Englishing
3Old Englishingmeadow, water meadow, ing
4Old Norseengmeadow
5Proto-GermanicangijōA low lying meadow in a valley or near a river
6Proto-Indo-Europeanh₂énkoscurve, bend
7Proto-Indo-European-osCreates action nouns or result nouns from verbs;...

via English kitten

StepLanguageWordMeaning
1EnglishkittenA young cat, especially before sexual maturity; A...
2Middle Englishkitounkitten
3Middle Englishcatcat (feline)
4Old Englishcattcat
5Proto-West Germanic*kattucat
Every word from Proto-Indo-European -os