English
leavee
From leave + -ee.
Formed from leave + -ee
Proto-Indo-European *leyp- ‘to stick’
…
Proto-Germanic *laibijaną ‘to let stay’
Proto-West Germanic *laibijan ‘to leave behind’
Old English lǣfan ‘to leave’
Middle English leven ‘to leave’
English leave
Today it means
noun The person in a relationship who is left by the other.
Language periods are conventional ranges, not dates for this word.
Etymograph / leavee