obdurate

adj. 固执的，顽固的

oaken, OAP, oar, oarfish, oarlock, oarsman, OAS, oasis, oast, oasthouse, oat, oatcake, oath, oatmeal, oats, OAU, ob, obbligato, obbr.(=Music TV), obduracy, OBE, obedience, obedient, obediently, obeisance, obelisk, obese, obesity, obey, obfuscate, obfuscation, obiter dictum, obituary, object, object glass, object lens, object lesson, object to, object to sth., objection, objectionable,