馬利亞納海溝

Mariana Trench (or Marianas Trench)

surname Ma / abbr. for Malaysia 馬來西亞|马来西亚[Ma3 lai2 xi1 ya4]

horse / CL:匹[pi3] / horse or cavalry piece in Chinese chess / knight in Western chess

Maria (name) / Mary, mother of Jesus Christ

Mali (Tw)

sharp / favorable / advantage / benefit / profit / interest / to do good to / to benefit

Asia / Asian / Taiwan pr. [Ya3]

second / next to / inferior / sub- / Taiwan pr. [ya3]

surname Na

to receive / to accept / to enjoy / to bring into / to pay (tax etc) / nano- (one billionth) / to reinforce sole of shoes or stockings by close sewing

surname Hai

ocean / sea / CL:個|个[ge4],片[pian4] / great number of people or things / (dialect) numerous

marine trench

ditch / gutter / groove / gully / ravine / CL:道[dao4]