寄主

寄主	jì zhǔ	host (of a parasite)
寄	jì	to entrust; to place in sb's care / (bound form) to depend on; to attach oneself to; to reside temporarily / (bound form) foster (as in 寄女 foster daughter) / to send by post; to mail
主	zhǔ	owner / master / host / individual or party concerned / God / Lord / main / to indicate or signify / trump card (in card games)