locked-in (adjective) headstrong: stubborn
Sinonime: acicular, aciculate, acuminate, acuminous, acute, arrowlike, barbed, cornered, cuspidate, edged, fine,
keen, mucronate, peaked, piked, pointy, pronged, sagittal, sagittate, sharp, sharp-cornered, spiked
Antonime: blunt, dull