密 - secrecy, density (pop), minuteness

crowding together; clustering together; close formation; swarm

close adhesion; sticking firmly (to); being glued (to)

close thicket; dense forest; jungle

close (relationship, connection, etc.); intimate; near

density

poaching

smuggling; contraband trade

intimacy; friendship

secrecy; highly classified information

precise; exact; detailed; accurate; minute; close

secret; private; surreptitious

overcrowding; congestion; overpopulation