1640s, from sub- + marine (adj.).
submarine (n.)
"submarine boat," 1899, from submarine (adj.). Earlier "a creature living under the sea" (1703). The short form sub is first recorded 1917. As a type of sandwich from 1955, so called from the shape of the roll. Related: Submariner.
sublimity
sublingual
sublunary
subluxation
sub-machine-gun
submarine
submerge
submerse
submersible
submersion
submission
