φύσας

Participle

 * : "(he) has brought forth/produced/generated/begot, (he) has created/made, (he) has caused to be/exist"

Etymology 2
Substantivization/nominalization of the participle.

Noun

 * 1)  "he who has brought forth/produced/generated/begot, he who has created/made, he who has caused to be/exist"
 * 2)  father, forefather/(male) ancestor  (cf. )