noun (plural torpedoes)
verb (torpedoes, torpedoing, torpedoed)[with object]
early 16th century (in sense 3 of the noun): from Latin, literally 'stiffness, numbness', by extension 'electric ray' (which gives a shock causing numbness), from torpere 'be numb or sluggish'. sense 1 of the noun dates from the late 18th century and first described a timed explosive device for detonation under water
The plural of torpedo is made by adding -es: torpedoes.