Where does “onychoptosis” come from?

onychoptosis (English) comes from English ptosis, from Ancient Greek πτῶσις, from Ancient Greek πίπτω, from Ancient Greek -ωσις, from Ancient Greek -σῐς, from Ancient Greek -τις, from Proto-Indo-European -tis — Derives abstract/action nouns from verb roots.

Ancestry of “onychoptosis”, step by step

Step	Language	Word	Meaning
1	English	ptosis	The prolapse of a bodily organ, especially...
2	Ancient Greek	πτῶσις	falling, a fall; case; inflection
3	Ancient Greek	πίπτω	to fall, throw oneself down
4	Ancient Greek	-ωσις	abnormal condition or state; state, abnormal...
5	Ancient Greek	-σῐς	"suffix forming nouns"
6	Ancient Greek	-τις	retained after dentals
7	Proto-Indo-European	-tis	Derives abstract/action nouns from verb roots

Every word from Proto-Indo-European -tis →Every word from Ancient Greek -σῐς →Every word from Ancient Greek -ωσις →