動詞 loosen up:

1. cause to become unblocked
   同義詞：unstuff
2. become less tense, less formal, or less restrained, and assume a friendlier manner
   同義詞：relax
3. make one's body limber or suppler by stretching, as if to prepare for strenuous physical activity
   同義詞：limber up, warm up
4. become less tense, rest, or take one's ease
   同義詞：relax, unbend, unwind, decompress, slow down
5. cause to feel relaxed
   同義詞：relax, unstrain, unlax, unwind, make relaxed

1. I stretch to loosen up.
   我伸展身體。
2. Don't be so nervous loosen up a bit.
   別那麼緊張--放松一點。
3. You should loosen up (your muscles) before playing any sport.
   運動之前應先放松(肌肉).
4. I must take some exercise and loosen up my muscles.
   我必須運動一下放松放松肌肉。