1

明珠

míngzhū

pearl jewel (of great value)

=2

暗

àn

variant of 暗 àn

=2

暗

àn

dark to turn dark secret; hidden (literary) confused; ignorant

=2

暗

àn

(literary) to close (a door) to eclipse confused; ignorant (variant of 暗 àn) dark (variant of 暗 àn)

3

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