knock at

knock at something

to knock [on something] at a particular location. I could hear someone knocking at the door next to mine. Who is knocking at the door?

Name	Pronounced	Usage
Turner	['tə:nə]
Jaime (2)	JAY-mee	English
CillÍN	-	Irish
Elpida	-	Greek
Ajay	-	Indian, Hindi, Marathi, Gujarati, Bengali, Telugu, Kannada, Malayalam, Tamil
Waltraud	-	German