one that whitens or whoever occupation is always to whiten by bleaching
- a worker who bleaches (fabric or flour etc.)
- one that whitens, or whose profession would be to whiten, byu000du000a bleaching.
1540s, "one who bleaches," agent noun from bleach (v.). The "bench for spectators at a sports field" sense (usually bleachers) is attested since 1889, American English; so named because the boards were bleached by the sun.
(letter.) One who whitens, or whose occupation would be to bleach, by bleaching.