buckle
fasten
SMART Vocabulary: related words and phrases
Unfastening and opening
break something open
breaker
broach
decongestion
gape
let/set something looseidiom
loose
shut (someone) up
tease
tease something out
the earth/ground/floor opensidiom
unbolted
unbuckle
unfold
unknot
unlace
unlock
unlockable
unpick
unzip