stick to guns

immobile immutable impassive inflexible motionless stationary steadfast uncompromising unshakable unyielding

adamant constant fast firm set solid stable

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

flexible mobile moving unfixed willing yielding

changeable inconstant indefinite loose movable soft supple undecided unstable untrustworthy wavering

carry on carry over continue endure go on linger persevere prevail pursue recur remain

abide grind insist last obtain perseverate repeat strive

be resolute be stubborn follow through follow up go all the way go the limit hold on keep up leave no stone unturned perdure see through stick it out tough it out

cease discontinue give up go halt leave stop

forget

quit