投寄

投寄	tóu jì	to send by post
投	tóu	to throw (sth in a specific direction: ball, javelin, grenade etc) / to cast (a ballot) / to cast (a glance, a shadow etc) / to put in (money for investment, a coin to operate a slot machine) / to send (a letter, a manuscript etc) / to throw oneself into (a river, a well etc to commit suicide) / to go to; to seek refuge; to place oneself into the hands of / (coll.) to rinse (clothes) in water
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