unloose

• vt. 解开；放开；放松

un-, 此处词义比较特殊，表加强义，类似于loose away.

unloose (v.)

mid-14c., "relax;" late 14c., "to set free," from un- (2), used here emphatically, + loose. Old English had unliesan "unloose, set free." Related: Unloosed; unloosing.