-osis

The story

1. Ancient Greek · derived from-ωσις“state, abnormal condition, or action”
2. New Latin · learned borrowing from-ōsis
3. English today-osis

Learned borrowing from New Latin -ōsis, from Ancient Greek -ωσις (-ōsis, “state, abnormal condition, or action”), from -όω (-óō) stem verbs + -σις (-sis).