Sardonian

Origin

From Latin sardonius, from Ancient Greek Σαρδόνιος ("Sardinian"), earlier σαρδάνιος.

Full definition of Sardonian

Adjective

1. (obsolete) Sardonic.
• 1596, Edmund Spenser, The Faerie Queene, V.9:He gan with guilefull words her to perswade
  To banish feare; and, with Sardonian smyle
  Laughing on her, his false intent to shade,
  Gan forth to lay his bayte ….