Where does “espion” come from?

espion (Norman) comes from French espion, from Middle French espion, from Old French espion, from Frankish *spehō, from Frankish spehōn, from Proto-Germanic spehōną, from Proto-Indo-European speḱ- — to see, to look, to observe.

espion (Norman): spy

Definitions

Ancestry of “espion”, step by step

Step	Language	Word	Meaning
1	French	espion	spy
2	Middle French	espion	—
3	Old French	espion	spy
4	Frankish	*spehō	—
5	Frankish	spehōn	to spy, watch; to peer, to look, to spy
6	Proto-Germanic	spehōną	to peer, look, spy
7	Proto-Indo-European	speḱ-	to see, to look, to observe

Every word from Proto-Indo-European speḱ- →