improve Antonyms

worsen deteriorate swooping surbate suppurate sully subvert subverse subtract subside subsiding tinct systole thwart threaten tarnishing tamperer tampering tamp taint tacky tabid submersion submerse submergence sprain spoil spoiling splint spinach sphacelate spall souring sour sprung squashing subduct stupefy stultification stop standstill stale stain stagnate stab sordes tinker worn usury urine