Plural of “torpedo”

The plural of torpedo is torpedoes.

Why

"Torpedo" comes from Latin "torpere," to be numb or paralyzed, originally the name for the electric ray, a fish capable of delivering a stunning shock. The word was repurposed in the 19th century for naval self-propelled explosive weapons, precisely because the new weapon, like the fish, could disable a target from a distance without direct contact.

By the time "torpedo" took on its modern military sense, English had a well-established habit of pluralizing most consonant-plus-o nouns with -es, and "torpedo" followed that pattern closely, joining "echo," "veto," and "embargo" rather than the newer, more casually borrowed -o nouns that simply add -s. Robert Fulton and other early 19th-century inventors originally used "torpedo" for what we'd now call a naval mine, a stationary explosive device, before the word narrowed to specifically mean a self-propelled underwater weapon once that technology was developed later in the century. Robert Whitehead's 1866 design is generally credited as the first genuinely self-propelled torpedo, and it was his design, adopted by navies across Europe, that permanently shifted the word away from Fulton's earlier stationary-mine sense toward the moving weapon most people picture today.

Usage note

"Torpedoes" is the only standard plural in both the historical fish sense and the far more common modern weapons sense; there's no accepted "torpedos" spelling in careful writing. The word also survives in the American food term "torpedo roll" or "torpedo sandwich," describing a long, tapered sandwich roll, an unrelated figurative extension based purely on the weapon's characteristic elongated shape.

The word's original animal sense survives today mostly in scientific and diving contexts, where "torpedo" or "torpedo ray" still names several species of electric ray found in warm coastal waters worldwide, a usage now considerably rarer than the weapons sense that has dominated the word since the 20th century's world wars. Submarine warfare terminology built an entire specialized vocabulary around "torpedoes," including "torpedo tubes," "torpedo boats," and "torpedo bombers," each a fixed compound where "torpedo" functions as a singular adjectival modifier regardless of how many torpedoes are actually involved.

Common real mistakes

As with the other -oes words in this family, the main slip is dropping the extra -e under the influence of more familiar plain-s words like "photo" or "video." Military and naval history writing, where this word appears constantly, generally holds the line on "torpedoes." Writers occasionally also confuse "torpedo" the weapon with "torpedo" used as an informal verb meaning to deliberately sabotage or ruin something ("the scandal torpedoed his campaign"), a figurative extension that conjugates as a regular verb, unrelated to the noun's own irregular plural.

The wider pattern

"Torpedo" belongs to the same 19th-century layer of English vocabulary as many other now-common -oes words that entered general use through science, medicine, or military technology and inherited the older assimilated -oes pattern already established by earlier borrowings like "echo" and "hero."

Examples

• The submarine fired two torpedoes at the enemy vessel.
• Several torpedoes missed their target in the rough seas.
• Engineers tested new guided torpedoes off the coast.
• The wreck was struck by torpedoes during the war.
• Naval historians catalogued every torpedo attack of the campaign.
• The ship carried a full complement of torpedoes.
• Three torpedoes were recovered from the seabed decades later.
• The museum displays torpedoes used during both world wars.
• Defensive nets were designed to stop incoming torpedoes.
• The captain ordered all torpedoes loaded before dawn.
• Divers located four unexploded torpedoes on the ocean floor.
• The exhibit traced how torpedoes evolved from simple mines to guided weapons.
• The historian traced how torpedoes changed naval strategy after World War One.
• Salvage crews recovered several torpedoes from the sunken destroyer.
• The engineers redesigned the torpedoes to reduce detection risk.