twiddle
US /ˈtwɪd.əl/
UK /ˈtwɪd.əl/
1.
lảng vảng
to move something repeatedly between your fingers, especially without any purpose:
:
•
She was twiddling (with) a pencil/her hair.
1.
lảng vảng
an act of turning something with the fingers:
:
•
At the twiddle of a knob the operators can focus on a tiny amount of airspace or scan the whole area.