caustic

sapekas, ivallinen, pureva

syövyttävä emäs

syövyttävä Capable of burning, corroding or destroying organic tissue.
(of language, etc.) sharp Sharp, bitter, cutting, biting, and sarcastic in a scathing way.
1843: "How now!" said Scrooge, caustic and cold as ever. — Charles Dickens, A Christmas Carol
1843: The bargain was not concluded as easily as might have been expected though, for Scadder was caustic and ill-humoured, and cast much unnecessary opposition in the way — Charles Dickens, Martin Chuzzlewit
1853: Madame Beck esteemed me learned and blue; Miss Fanshawe, caustic, ironic, and cynical — Charlotte Bronte, Villette
1857:The Secretary and the Assistant-Secretaries would say little caustic things about him to the senior clerks, and seemed somewhat to begrudge him his new honours. — Anthony Trollope, The Three Clerks
1886: this set of worthies, who were only too prone to shut up their emotions with caustic words. — Thomas Hardy, The Mayor of Casterbridge
(quote-book)
1930s???: though he came too late / To join the martyrs, there was still a place / Among the tempters for a caustic tongue / / To test the resolution of the young / With tales of the small failings of the great — W.H.Auden, 'The Quest'
Any substance or means which, applied to animal or other organic tissue, burns, corrodes, or destroys it by chemical action; an escharotic.
puhekieltä The envelope of reflected or refracted rays of light for a given surface or object.
puhekieltä The envelope of reflected or refracted rays for a given curve.
puhekieltä caustic soda