loosen

[1]	loose , loose , undo , unfasten , unhook , unbutton , unlace , untie , unbind , unbuckle , unscrew
[2]	weaken , relax , detach , separate , sever , break/cut (apart)
[3]	relax
[4]	tease , tease apart
[5]	untie , undo
[6]	relax , loose