submarine - a vehicle that can travel under the surface of water, subject - the topic of a conversation, a school subject, subway - a path that goes underneath a road, an underground railway, submerge - to push something underwater, subtropical - living or being next to the hottest parts of the Earth, substandard - not good enough; below what is expected, subdivide - to share or group something that has already been divided, subtitle - words that translate what is said in a film and appear on the screen at the bottom, subheading - a title to a section of writing that comes after the main title, submit - to give in, surrender,

sub- prefix

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