Definition

A type of nut that is designed to prevent loosening when tightened against another nut or part.

Example

The mechanic used a locknut to ensure the bolt would not come loose during operation.

Conversation

Hey, do you know what a locknut is?

Yeah, it's that nut that keeps everything tight, right?

Exactly! I need to get some for my bike repair.

Good idea, they really help prevent things from loosening up.

Synonyms & Antonyms

Root Explanation

Locknut → The word is formed from "lock" (from Old English *locc*, meaning to fasten or secure) and "nut" (from Old English *hnutu*, meaning a hard-shelled fruit or seed). A locknut is a type of nut that is designed to secure another nut in place, preventing it from loosening.

Memory Tip

Think of 'locking' something in place with a 'nut' — that's why a locknut is used to secure another nut.

Visually Confused Words