Where does “espiar” come from?

espiar (Galician) comes from Vulgar Latin spiare, from Frankish spehōn, from Proto-Germanic spehōną, from Proto-Indo-European speḱ- — to see, to look, to observe.

espiar (Galician): to spy; to peek; to peep

Definitions

to spy; to peek; to peep

Ancestry of “espiar”, step by step

Step	Language	Word	Meaning
1	Vulgar Latin	spiare	present active infinitive of *spiō
2	Frankish	spehōn	to spy, watch; to peer, to look, to spy
3	Proto-Germanic	spehōną	to peer, look, spy
4	Proto-Indo-European	speḱ-	to see, to look, to observe

Every word from Proto-Indo-European speḱ- →Every word from Proto-Germanic spehōną →Every word from Frankish spehōn →