English

jumpoff

Deverbal from jump off.

A compound of jump + off

Middle English jumpen ‘to walk quickly’

English jump

Proto-Indo-European *h₂ep

…

Proto-West Germanic *ab

Old English æf ‘of’

Old English of ‘from’

Middle English of

English off

Today it means

noun The final round of an equestrian showjumping event.

Language periods are conventional ranges, not dates for this word.