tightening

tightening, easing, looser, toughening, tighter, liberalizing, softening, stiffening, constricting, stricter, ratcheting, restrictive, relaxed, flexing, strengthening, weakening, fraying, clamping, lowering, slackening, freer, lifting, thawing, constriction, lessening, firming, hardening, restricting, beefing, squeezing, relaxation, bolstering, narrowing, slowing, stiffer, cinching, tweaking, crimping, laxer, lengthening, yanking, revising, unhinging, bending, constraining, quickening, tugging, dampening, chafing, curtailing, shoring, broadening, rigid, removing, deregulating, buckling, cracking, limiting, abolishing, modifying, slippage, curbing, enforcing, mending, shaking, regulating, stabilizing, tamps, rethinking, overhauling, pulling, amending, tougher, undoing, severing, reshaping, strangling, clenching, squelching, dirigiste, normalizing, straining, reimposition, permissive, mandating, changing, fasten, shifting, favoring, screw, nudging, tearing, stifling, overturning, cutting, improving, untying, pushing, sticking, laissez faire, putting, reining, curtailment, blurring, desiccation, deterioration, subsidence, amelioration, darkening, diminution, reduction, widening, alteration, decline, decrease, increase, shortening, inducing, reducing, transforming, activating, destabilizing, enhancing, forming, localizing, socializing, stabilising, accelerating, altering, atherogenic, bactericidal, causing, clotting, coagulative, cytolytic

unfastening

locknut, lockring, lock ring, lock washer, ret, safety nut, undoing, unfastening, untying

adjustment, modification