torpedo
US /tɔːrˈpiː.doʊ/
UK /tɔːrˈpiː.doʊ/

1.
a cigar-shaped self-propelled underwater missile designed to be fired from a ship or submarine and explode on impact or in proximity to the target.
:
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The submarine launched a torpedo at the enemy vessel.
•
The ship was hit by a torpedo and began to sink.
1.