fret - noun

agitation resulting from active worry

a spot that has been worn away by abrasion or erosion

an ornamental pattern consisting of repeated vertical and horizontal lines (often in relief)

a small bar of metal across the fingerboard of a musical instrument; when the string is stopped by a finger at the metal bar it will produce a note of the desired pitch

fret - verb

• worry unnecessarily or excessively
• be agitated or irritated
• provide (a musical instrument) with frets
• become or make sore by or as if by rubbing
• cause annoyance in
• gnaw into; make resentful or angry
• carve a pattern into
• decorate with an interlaced design
• be too tight; rub or press
• cause friction
• remove soil or rock
• wear away or erode

fret - thesaurus

chafe   choke   erode   fray   fuss   gag   gall   grate   lather   niggle   rankle   rub   scratch   stew   sweat   swither