locked in (adjective) hard-nosed/hardheaded: stubborn
Sinonime: aciculate, acuate, acuminate, acuminous, acute, apical, barbed, briery, cuspate, cuspidate, edged, fine, ground fine, honed, horned, jagged, keen, keen-edged, knife-edged, knifelike, lancinating, needle-pointed, needlelike, peaked,
piercing, poin, pointed
Antonime: easy, easy-going,
laid-back,
merciful