Caustically

1caus;tic pronunciation: function: adjective etymology: latin causticus, from greek kaustikos, from kaiein to burndate: 14th century 1 : capable of destroying or eating away by chemical action : corrosive2 : marked by incisive sarcasm3 : relating to or being the surface or curve of a caustic— caus;ti;cal;ly adverb — caus;tic;i;ty noun synonyms caustic, mordant, acrid, scathing mean stingingly incisive. caustic suggests a biting wit lt;caustic commentsgt;. mordant suggests a wit that is used with deadly effectiveness lt;mordant reviews of the playgt;. acrid implies bitterness and often malevolence lt;acrid invectivegt;. scathing implies indignant attacks delivered with fierce severity lt;a scathing satiregt;.