# knocking

Pronunciation: say "NOK-ing" US /ˈnɑkɪŋ/, UK /ˈnɒkɪŋ/

## Noun

1. An act of striking a surface to produce a sound, or the sound that results from it.
   - Simple: The act of hitting a surface to make a sound, or the sound it makes.
   - _Her knocking grew louder when no one came to answer._
   - _The steady knocking of a woodpecker echoed through the forest._
3. A repetitive ping or knock from an engine caused by uncontrolled explosions in the combustion chamber.
   - Simple: A repeated tapping or pinging sound from a car engine that is not burning its fuel smoothly.
   - _Mechanics traced the knocking to poor-quality fuel in the tank._
   - _Under heavy load, the knocking became impossible to ignore._

## Verb

2. Present participle of knock. — present participle and gerund of knock
   - Simple: Present participle of knock. Use this form for something happening right now.
   - _He is knocking loudly, hoping someone will let him in._
   - _They were knocking at the window to get our attention._

Source: DictionaryAI, https://dictionaryai.com/define/knocking (written from Wiktionary data, CC BY-SA 4.0: https://creativecommons.org/licenses/by-sa/4.0/).