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sub·ma·rine (sŭbmə-rēn, sŭbmə-rēn)
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n.
1. Nautical A vessel that is capable of operating submerged.
2. A submarine sandwich.
3. Baseball A pitch that is thrown with a low sidearm or underhand motion.
adj.
1. Beneath the surface of the water; undersea.
2. Thrown with or characterized by a low sidearm or underhand motion: a submarine-style pitcher.
v. sub·ma·rined, sub·ma·rin·ing, sub·ma·rines
v.tr.
1. To attack by submarine, especially with torpedoes.
2. Sports To knock down with a blow to the legs.
3. Baseball To pitch (a ball) with a low sidearm or underhand motion.
v.intr.
1. To slide, drive, or be thrown under something: seats designed to prevent passengers from submarining under their seat belts in a crash.
2. To ride in or serve as a crew member of a submarine.
(click for a larger image)
submarine
USS Virginia

The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2019 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
 

Indo-European & Semitic Roots Appendices

    Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:

    Indo-European Roots

    Semitic Roots

    The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.

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