投

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