fretless

transitive verb fretted, fretting

1. to eat away; gnaw
2. to wear away by gnawing, rubbing, corroding, etc.
3. to make or form by wearing away
4. to make rough; disturb: wind fretting the water
5. to irritate; vex; annoy; worry

intransitive verb

1. to gnaw (into, on, or upon)
2. to become eaten, corroded, worn, frayed, etc.
3. to become rough or disturbed
4. to be irritated, annoyed, or querulous; worry

noun

1. a wearing away
2. a worn place
3. irritation; worry