-osis
suffixUK /-əʊ.sɪs/ · CA, US /-oʊ.sɪs/
Etymology Learned borrowing from New Latin -ōsis, from Ancient Greek -ωσις (-ōsis, “state, abnormal condition, or action”), from -όω (-óō) stem verbs + -σις (-sis).
2
Morpheme process, action such as phagocytosis
3
Morpheme formation, increase such as leukocytosis