invest (v.) Look up invest at
late 14c., "to clothe in the official robes of an office," from Latin investire "to clothe in, cover, surround," from in "in, into" (see in- (2)) + vestire "to dress, clothe," from PIE *wes-ti-, suffixed form of root *wes- (4) "to clothe" (see wear (v.)).

The meaning "use money to produce profit" first attested 1610s in connection with the East Indies trade, and is probably a borrowing of a special use of Italian investire (13c.) from the same Latin root, via the notion of giving one's capital a new form. Figurative sense of "to clothe (with attributes)" is from c. 1600. The military meaning "to besiege, surround with hostile intent" also is from c. 1600. Related: Invested; investing.