appropriation - a deliberate act of acquisition

naturalisation, naturalization - changing the pronunciation of a borrowed word to agree with the borrowers' phonology; "the naturalization in English of many Italian words"

misappropriation - wrongful borrowing; "his explanation was a misappropriation of sociological theory"

crossover - the appropriation of a new style (especially in popular music) by combining elements of different genres in order to appeal to a wider audience; "a jazz-classical crossover album"

transaction, dealing, dealings - the act of transacting within or between groups (as carrying on commercial activities); "no transactions are possible without him"; "he has always been honest is his dealings with me"

pawn - borrowing and leaving an article as security for repayment of the loan