叩门

叩门	kòu mén	to knock on a door
叩	kòu	to knock / to kowtow
叩	kòu	old variant of 叩 / to knock
门	Mén	surname Men
门	mén	gate / door / CL:扇 / gateway / doorway / CL:个 / opening / valve / switch / way to do something / knack / family / house / (religious) sect / school (of thought) / class / category / phylum or division (taxonomy) / classifier for large guns / classifier for lessons, subjects, branches of technology / (suffix) -gate (i.e. scandal; derived from Watergate)