verb
fret
FRET/fret/
To worry or be visibly anxious.
The woman frets, twisting a tissue between her hands.

Etymology
Eating away and rubbing became a metaphor for worry consuming or vexing someone.
To worry or be visibly anxious.
The woman frets, twisting a tissue between her hands.

Eating away and rubbing became a metaphor for worry consuming or vexing someone.