flipper
UK: ˈflɪpə | US: ˈflɪpər
n. a broad, flat limb adapted for swimming (e.g., on seals or turtles)
n. a flat rubber attachment worn on the foot for underwater swimming
n. (informal) someone or something that flips or turns over
The word "flipper" originates from the verb "flip," which emerged in the 16th century, meaning "to toss or move lightly." The suffix "-er" was added to form a noun denoting an object or creature that performs the action (e.g., "swimmer"). By the 19th century, "flipper" specifically described the paddle-like limbs of aquatic animals, later extending to human swimming aids. The logic reflects both motion (flipping) and function (a tool for propulsion).
The sea turtle used its powerful flippers to glide through the water.
She strapped on her flippers before diving into the coral reef.
The seal’s flippers help it steer gracefully while hunting.
He lost a flipper while snorkeling and had to swim back awkwardly.
(Informal) The acrobat was a natural flipper, performing backflips effortlessly.