submersible
adj.
1862, from submerse or from Latin submers-, past participle stem of submergere + -ible. As a noun, from 1900, "a submersible craft." Alternative adjective submergible is attested from 1820, from submerge.
〔蒋〕[sub-下,mers沉,-ible形容词后缀,...的] 可沉于水中的