Definition of adamant:
relentless, iron, dogged, unappeasable, baseball diamond, hardened, inconvincible, unforgiving, uncompliant, bloody-minded, self-opinionated, inexorable, willful, intransigent, inflexible, ossified, immovable, rhombus, baseball field, narrow-minded, brassbound, die-hard, resist, headstrong, study atinflexible, pat, grim, ball field, unbending, settled, self-willed, adamantine, incompliant, implacable, closed, set, stiff-necked, hard, diamond, narrow, conservative, perverse, infield, bullheaded, opinionated, intolerant, remorseless, pigheaded, rhomb, stern, unrelenting.
Mrs. Wix was adamant.- "What Maisie Knew", Henry James.
- "Korea's Fight for Freedom", F.A. McKenzie.
At a later date they sought to limit him to the restricted sphere sketched out at London; but then it was too late to bend to their will a nature which, firm at all times, was hard as adamant when the voice of conscience spoke within.- "The Development of the European Nations, 1870-1914 (5th ed.)", John Holland Rose.