What is the meaning of the word "fret"?

Definitions:

A state of anxiety, restlessness, or irritation. NOUN
- She was in a constant fret about her exams.
In architecture or design contexts, refers to a decorative patterns of interlaced lines, often geometric. NOUN
- The columns were carved with a Greek fret pattern.
In music context, refers to one of the raised metal strips on the fingerboard of a guitar or similar instrument, used to divide pitches. NOUN
- Place your fingers just behind the third fret.
To gradually wear down, corrode, or erode something- often used for natural or mechanical processes. VERB
- The stream had fretted away the rocks over centuries.
To worry, be anxious, or show distress, often about something minor or uncontrollable. VERB
- Don't fret- everything will work out.