a German submarine in service during WWI or WWII
Origin of U-boatfrom German U-boot, abbreviation, abbreviated of Unterseeboot, undersea boat
A submarine of the German navy.
Origin of U-boatTranslation of German U-Boot short for Unterseeboot unter under ( from Middle High German under ) ( from Old High German untar ; see &nlowring;dher- in Indo-European roots.) See sea ( from Middle High German sē ) ( from Old High German) Boot boat