密切

close / familiar / intimate / closely (related) / to foster close ties / to pay close attention

secret / confidential / close / thick / dense

to cut / to slice / tangent (math)

definitely / absolutely (not) / (scoffing or dismissive interjection) Yeah, right. / Tut! / to grind / close to / eager / to correspond to / see also 反切[fan3 qie4]