barter
1. bar.ter \'ba:rt-*r\ \-*r-*r\ vb [ME bartren, fr. MF barater] : to trade by exchanging one commodity for another : to trade or exchange by or as if by bartering - bar.ter.er n 2. barter n 1: the act or practice of carrying on trade by bartering 2: the thing given in exchange in bartering