English

keymove

key + move

A compound of key + move

Proto-West Germanic *kaiju

Old English cǣġ ‘key’

Middle English keye ‘a key’

English key

Proto-Indo-European *m(y)ewh₁- ‘to move, drive’

…

Proto-Italic *moweō ‘to move’

Latin moveō ‘move’

Old Northern French mover ‘to move’

Middle English moven

English move

Today it means

noun The first and most important move in solving a chess problem.

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