peroxide

Estimated CEFR level: C2 — Proficiency

Estimated from word frequency; not an official CEFR classification.

Definition

noun a viscous liquid with strong oxidizing properties; a powerful bleaching agent; also used (in aqueous solutions) as a mild disinfectant and (in strong concentrations) as an oxidant in rocket fuels
noun an inorganic compound containing the divalent ion -O-O-
verb bleach with peroxide

From per- + oxide.

The door opened, and a heavily over-dressed and peroxided lady made her appearance, whom Lord Peter would at once—and embarrassingly—have recognised. — Unnatural death, Dorothy L. (Dorothy Leigh) Sayers

hydrogen peroxide

Type a word, a sentence, a book title, or a link to an English article. WordNet and the Classics answer.

Try

A library of classics · a vault of words · instant etymology & meaning