dug in

rooted

firm fixed fortified

changeable indefinite irresolute

immobile immutable impassive inflexible motionless stationary steadfast uncompromising unshakable unyielding

adamant constant fast firm set solid stable

dead set on hard-nosed immotile intransigent locked-in obdurate quiescent resolute rooted secure set in concrete set in stone standpat stick to guns stuck unalterable unchangeable unmodifiable unwavering

flexible mobile moving unfixed willing yielding

changeable inconstant indefinite loose movable soft supple undecided unstable untrustworthy wavering

crisp firm obstinate reserved

aloof distant do-or-die formal hard as nails hard-line hold one's ground hold the fort hold the line incompliant inelastic inexorable inflexible intractable locked-in obdurate relentless resolute set in stone severe single-minded standing one's ground standing pat sticking to one's guns stiff strict stubborn uncompromising unflexible unrelenting unswayable unyielding uptight

flexible soft yielding

bending pliable pliant relaxed