n.

1. 扭；捏；擰
2. 苦惱，焦急

vt.

1. 扭；捏；擰
   You have to use a lot of force to tweak and open this bottle of beverage.

   你必須用很大的力氣才能將這瓶汽水打開。

v.

1. twist or pull with a small sharp movement.
2. informal improve by making fine adjustments.

n.

1. an act of tweaking.
2. informal a fine adjustment.