Definition of

Darken

  1. (verb, change) become dark or darker
  2. (verb, contact) tarnish or stain
  3. (verb, change) make dark or darker

via WordNet, Princeton University

Antonyms of Darken

brighten, lighten

Origin of the word Darken

  1. c. 1300, "to make dark;" late 14c., "to become dark." The more usual verb in M.E. was simply dark, as it is in Chaucer and Shakespeare, and darken did not predominate until 17c. The Anglo-Saxons also had a useful verb, sweorcan, meaning "to grow dark." To darken someone's door (usually with a negative) is attested from 1729. more

via Online Etymology Dictionary, ©2001 Douglas Harper

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