open up

verb

1.
cause to open or to become open
ajar dup open
2.
become available
open
3.
make available
open
4.
open up an area or prepare a way
pioneer
See also:
open
5.
start to operate or function or cause to start operating or functioning
open
6.
become open
ajar open
7.
talk freely and without inhibition
Antonym:
close up