U-boat

noun
🔊/ˈjuː bəʊt/
🔊/ˈjuː bəʊt/
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  1. a German submarine(德国)U 潜艇 (= a ship that can travel underwater)Topics Transport by waterc2
    Word Originfrom German U-boot, abbreviation of Unterseeboot ‘undersea boat’.