杜門

to close the door (lit. and fig.)

surname Du

birchleaf pear (tree) / to stop / to prevent / to restrict

gate / door / CL:扇[shan4] / gateway / doorway / CL:個|个[ge4] / 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)

to shut the door and remain inside / fig. to cut off contact