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
Agrippa	ə-GRI-pə (English)	Ancient Roman, Biblical
ChloÉ	klo-E	French
Allyn	AL-in	English
Lenz	LENTS	German
Valentin	['væləntin]
Terrie	TER-ee	English