Where does “treachersome” come from?

treachersome (English) comes from English some, from Middle English som, from Old English sum, from Proto-West Germanic *sum, from Proto-Germanic sumaz, from Proto-Indo-European sem- — together, one.

treachersome (English): Characterised or marked by treachery; treacherous

Definitions

  1. Characterised or marked by treachery; treacherous

Ancestry of “treachersome”, step by step

treachersome traces back through two separate lines of ancestry.

via English some

StepLanguageWordMeaning
1EnglishsomeA certain number, at least two; An indefinite...
2Middle Englishsomsome
3Old Englishsumsome
4Proto-West Germanic*sumsome
5Proto-Germanicsumazsome (one), a certain (one)
6Proto-Indo-Europeansem-together, one

via English treacher

StepLanguageWordMeaning
1EnglishtreacherA traitor or deceiver
2Middle Englishtrecher—
3Old Frenchtrecheor—
4Old Frenchtrechier—
Every word from Proto-Indo-European sem- →Every word from Proto-Germanic sumaz →Every word from Proto-West Germanic *sum →