Where does “unfitful” come from?

unfitful (English) comes from English fitful, from English -ful, from Middle English -ful, from Old English -ful, from Proto-Germanic -fullaz, from Proto-Germanic fullaz, from Proto-Indo-European pl̥h₁nós, from Proto-Indo-European pleh₁- — to fill.

unfitful (English): Not fitful

Definitions

  1. Not fitful

Ancestry of “unfitful”, step by step

unfitful traces back through two separate lines of ancestry.

via English fitful

StepLanguageWordMeaning
1EnglishfitfulIrregular; unsteady; characterized by fits
2English-fulUsed to form adjectives from nouns. Full of,...
3Middle English-fulAppended to nouns to form adjectives denoting...
4Old English-fulfull of; -ful
5Proto-Germanic-fullaz-ful
6Proto-Germanicfullazfull; the whole, the entire
7Proto-Indo-Europeanpl̥h₁nósfull
8Proto-Indo-Europeanpleh₁-to fill

via English un

StepLanguageWordMeaning
1EnglishunOne
Every word from Proto-Indo-European pleh₁-Every word from Proto-Indo-European pl̥h₁nósEvery word from Proto-Germanic fullaz