English
flexi-leave
From flexi(ble) + leave.
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 An arrangement where time off is granted in exchange for additional hours an employee has worked.
Language periods are conventional ranges, not dates for this word.
Etymograph / flexi-leave