open up (v.)
- acknowledge
- admit
- advance
- aid
- air
- allow
- appear
- avow
- bare
- branch
- breach
- broach
- chink
- cleave
- concede
- confess
- crack
- cut
- deploy
- develop
- disclose
- discover
- disperse
- display
- divaricate
- divide
- divulge
- ease
- expand
- expedite
- explain
- expose
- extend
- facilitate
- fan
- fissure
- flare
- grant
- grease
- hasten
- impart
- incise
- introduce
- launch
- loose
- lubricate
- manifest
- materialize
- moot
- move
- oil
- ope
- open
- overgrow
- overrun
- own
- part
- pose
- postulate
- prefer
- propose
- proposition
- propound
- quicken
- ramify
- recommend
- rent
- reveal
- rift
- rip
- rive
- separate
- show
- simplify
- slit
- smooth
- speed
- spill
- splay
- split
- sprawl
- spread
- start
- submit
- suggest
- tap
- tear
- unbar
- unblock
- uncloak
- unclog
- uncover
- undrape
- unfold
- unfurl
- unmask
- unpack
- unroll
- unsheathe
- unveil
- unwrap
- ventilate
- widen