Irritable, bad-tempered, grumpy or peevish. / Unable to relax; fidgety or restless.

The quality of being fretful.

plural of fretfulness

(transitive, obsolete or poetic) Especially when describing animals: to consume, devour, or eat. / (transitive) To chafe or irritate; to worry.

Agitation of the surface of a fluid by fermentation or some other cause; a rippling on the surface of water. / Agitation of the mind marked by complaint and impatience; disturbance of temper; irritation.

An ornamental pattern consisting of repeated vertical and horizontal lines, often in relief. / (heraldry) A saltire interlaced with a mascle.

(transitive) To decorate or ornament, especially with an interlaced or interwoven pattern, or (architecture) with carving or relief (raised) work. / (transitive) To form a pattern on; to variegate.

(obsolete or dialectal) A ferrule, a ring.

To bind, to tie, originally with a loop or ring. / To fit frets on to (a musical instrument). / To press down the string behind a fret.

A channel, a strait; a fretum.