open up vs close up

open up and close up both are verbs.

Word	Noun	Adjective	Verb	Adverb
open up	No	No	Yes	No
close up	No	No	Yes	Yes

open up (verb)	close up (verb)
make available	refuse to talk or stop talking; fall silent
become available	block passage through
talk freely and without inhibition	unite or bring into contact or bring together the edges of
cause to open or to become open	cease to operate or cause to cease operating
become open
open up an area or prepare a way
start to operate or function or cause to start operating or functioning

open up (adverb)	close up (adverb)
	very close