unknot
/ˌʌnˈnɒt/verb
unknotted, unknotting
1
- with obj. release or untie the knot or knots in解开（结）：
he swiftly unknotted his tie.
他迅速解开领带。
2
- no obj.(of a muscle) relax after being tense and hard（肌肉）放松：
his shoulders unknotted.
他的双肩放松了下来。