submarine

a submersible warship usually armed with torpedoes

a large sandwich made of a long crusty roll split lengthwise and filled with meats and cheese (and tomato and onion and lettuce and condiments); different names are used in different sections of the United States

move forward or under in a sliding motion

The child was injured when he submarined under the safety belt of the car

throw with an underhand motion

bring down with a blow to the legs