Obdúrate, hard-hearted, inflexible: “o., flinty, hard as steel,” Ven. 199. “o. vassals fell exploits effecting,” Lucr. 429. “if your heart be so o.” Gent. IV, 2, 120. “he stands o.” Merch. IV, 1, 8. “if . . . God should be so o. as yourselves,” H6B IV, 7, 122. “stern, o., flinty,” H6C I, 4, 142. “be o., do not hear him plead,” R3 I, 3, 347. “if she be o. to mild entreaties,” III, 1, 39. “be not o., open thy deaf ears,” Tit. II, 3, 160.