fret

1. Agitation of the surface of a fluid by fermentation or some other cause; a rippling on the surface of water.
2. Agitation of the mind marked by complaint and impatience; disturbance of temper; irritation.
3. Herpes; tetter (“any of various pustular skin conditions”).
4. The worn sides of riverbanks, where ores or stones containing them accumulate after being washed down from higher ground, which thus indicate to miners the locality of veins of ore.