bleachnoun詞源 1/bliːt͡ʃ/

• 1

  A chemical, such as sodium hypochlorite or hydrogen peroxide, or a preparation of such a chemical, used for disinfecting or whitening.

• 2

  A variety of bleach.

bleachverb詞源 1/bliːt͡ʃ/

• 1

  To treat with bleach, especially so as to whiten (fabric, paper, etc.) or lighten (hair).

  • Candifacio, to make whyte, to bleache, to make to glowe lyke a burnyng cole.
  • The destruction of the colouring matters attached to the bodies to be bleached is effected either by the action of the air and light, of chlorine, or of sulphurous acid.
• 2

  To be whitened or lightened (by the sun, for example).

  • The white sheet bleaching on the hedge, With heigh! the sweet birds, O, how they sing!
  • […] when Mrs. Giddy-gaddy came to take out her clothes, deep green stains appeared on every thing, for she had forgotten the green silk lining of a certain cape, and its color had soaked nicely into the pink and blue gowns, the little chemises, and even the best ruffled petticoat. […] “Lay them on the grass to bleach,” said Daisy, with an air of experience.
• 3

  biologynatural-sciencesTo lose color due to stress-induced expulsion of symbiotic unicellular algae.

  • Once coral bleaching begins, corals tend to continue to bleach even if the stressor is removed.
• 4

  To make meaningless; to divest of meaning; to make empty.

  • semantically bleached words that have become illocutionary particles

bleachnoun詞源 2/bliːt͡ʃ/

• 1

  An act of bleaching; exposure to the sun.

bleachadj詞源 3/bliːt͡ʃ/

• 1

  archaicPale; bleak.

bleachnoun詞源 4/bliːt͡ʃ/

• 1

  obsoleteA disease of the skin characterized by hypopigmentation and itching, believed in the 17th century to be a form of leprosy.