Definition

A long piece of metal that turns in an engine and helps convert the up-and-down motion of the pistons into circular motion.

Example

The mechanic replaced the broken crankshaft to ensure the engine would run smoothly.

Conversation

Have you ever heard of a crankshaft?

Yeah, isn't it that part that helps the engine run?

Exactly! Without the crankshaft, the car wouldn't work properly.

That makes sense; I never realized how important it is.

Synonyms & Antonyms

Root Explanation

Crankshaft → The word is formed from "crank" (of uncertain origin, possibly from Middle Dutch "kranke", meaning a bend or curve) and "shaft" (from Old English "sceaft", meaning a pole or rod). The term refers to a rod that has a bent part (the crank) used to convert linear motion into rotational motion.

Memory Tip

Think of a 'crank' as a bend or curve that helps turn a 'shaft' or rod — that's why a crankshaft is a rod with a bend that helps in motion.

Visually Confused Words