engine knock

Fetched 2026-10-26 (cache).

Synonyms: engine block

Antonyms: engine block

Related words from Datamuse; suggestions, not definitions.

Noun

1. a [[rattling]], [[pinging]], or [[tapping]] sound caused by improper combustion, where the air-fuel mixture ignites spontaneously in the cylinders before the [[spark plug]] fires, or in multiple spots simultaneously

Source: Wiktionary · CC BY-SA 4.0 (Wiktionary dump) · cached copy, not a rewrite.