A submarine is a watercraft capable of independent operation underwater. It differs from a submersible, which has more limited underwater capability.

What does the name submarine mean?

The word submarine is composed of two morphemes, sub and marine. Sub is a prefix of Latin origin that means 'below' or 'under', while marine originates from the Latin 'marinus' meaning 'belonging or related to the sea'. The first recorded use of submarine is from 1648.

What is sub in submarine mean?

11. 4. Sub is short for submarine, subscription, substitute or a submarine sandwich. An example of a sub is an underwater boat used by the Navy.