Where does “ohjaussimpukka” come from?

ohjaussimpukka (Finnish) comes from Finnish simpukka, from Russian же́мчуг, from Old East Slavic жьмьчюгъ, from Khazar *ǯinǯü, from Common Turkic *yinǯü, from Middle Chinese 珍珠.

ohjaussimpukka (Finnish): steering box

Definitions

steering box

Ancestry of “ohjaussimpukka”, step by step

ohjaussimpukka traces back through two separate lines of ancestry.

via Finnish simpukka

Step	Language	Word	Meaning
1	Finnish	simpukka	bivalve any species of mollusks belonging to the class; the class Bivalvia
2	Russian	же́мчуг	pearl
3	Old East Slavic	жьмьчюгъ	—
4	Khazar	*ǯinǯü	—
5	Common Turkic	*yinǯü	—
6	Middle Chinese	珍珠	—

via Finnish ohjaus

Step	Language	Word	Meaning
1	Finnish	ohjaus	control, guidance, steering, instruction;...
2	Finnish	ohjata	to steer, pilot, navigate, drive a vehicle; to...
3	Proto-Finno-Ugric	*ohjat'ak	—

Every word from Middle Chinese 珍珠 →Every word from Common Turkic *yinǯü →Every word from Khazar *ǯinǯü →