Where does “シルエット” come from?

シルエット (Japanese) comes from French Silhouette, from Basque Ziloeta, from Basque zulo, from Proto-Basque *zuLo.

シルエット (Japanese): a silhouette

Definitions

Step	Language	Word	Meaning
1	French	Silhouette	—
2	Basque	Ziloeta	—
3	Basque	zulo	hole; pit; den, hiding place
4	Proto-Basque	*zuLo	—

シルエット — Etymology, Origin & Word History | Etymology Explorer