Where does “силуэт” come from?

силуэт (Russian) comes from French Silhouette, from Basque Ziloeta, from Basque zulo, from Proto-Basque *zuLo.

силуэт (Russian): silhouette

Definitions

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

силуэт — Etymology, Origin & Word History | Etymology Explorer