Where does “jerksome” come from?

jerksome (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.

jerksome (English): Indicative of quick, rapid movements; jerky;...

Definitions

  1. Indicative of quick, rapid movements; jerky;...

Ancestry of “jerksome”, step by step

jerksome 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 jerk

StepLanguageWordMeaning
1EnglishjerkA sudden, often uncontrolled movement, especially...
2Middle Englishyerksudden motion
3Old Englishġearcactive, quick; ready, active, quick
Every word from Proto-Indo-European sem- →
jerksome — Etymology, Origin & Word History | Etymology Explorer