Where does “mwuzaji” come from?

mwuzaji (Swahili) comes from Swahili uza, from French user, from Old French user, from Latin usare, from Latin utī.

mwuzaji (Swahili): seller, vendor

Definitions

Step	Language	Word	Meaning
1	Swahili	uza	to sell
2	French	user	to wear, wear down, wear off, wear out, grind...
3	Old French	user	to use; to employ; to make use of
4	Latin	usare	present active infinitive of *ūsō
5	Latin	utī	—