contaminate
con.tam.i.nate \k*n-'tam-*-.na-t\ \-.na-t-iv\ \-.na-t-*r\ vt [L contaminatus, pp. of contaminare; akin to L contagio conta]gion 1: to soil, stain, or infect by contact or association 2: to make unfit for use by introduction of unwholesome or undesirable ele mentsmake impure or unclean. CONTAMINATE implies intrusion of or contact with an outside source as the cause; TAINT implies that corruption and decay have begun to take effect; POLLUTE stresses the loss of purity and cleanness through contamination; DEFILE implies befouling of what ought to be clean and pure and suggests violation or desecration - con.tam.i.na.tive aj SYN syn CONTAMINATE, TAINT, POLLUTE, DEFILE mean to
Webster's English Dictionary