Where does “peștic” come from?

peștic (Romanian) comes from Romanian pește, from Latin per, from Latin Ad, from Latin illic, from Latin ille, from Latin olle, from Proto-Italic *olnos — that.

Ancestry of “peștic”, step by step

Step	Language	Word	Meaning
1	Romanian	pește	fish; pimp
2	Latin	per	through, by means of; throughout, during
3	Latin	Ad	toward, to
4	Latin	illic	he, she, it, yonder, that, overthere; in that...
5	Latin	ille	that; those; "; demonstrative pronoun "; that...
6	Latin	olle	Archaic form of ille
7	Proto-Italic	*olnos	that

Every word from Proto-Italic *olnos →Every word from Latin olle →Every word from Latin ille →