toughens Definition

tightens, tighten, boosts, intensifies, reinforces, aggravates, emphasizes, assures, stresses, strictness, insists, emphasize, ascends, anneals, escalates, underlines, underscores, stiffens, loosens, softens, eases, relaxes, strengthens, revises, alters, renews, modifies, sharpens, revokes, expands, adopts, improves, lowers, curtails, restricts, lightens, enacts, imposes, widens, rethinks, upholds, pushes, broadens, weakens, approves, liberalizes, freshens, repeals, enforces, lengthens, reinstates, establishes, suspends, bolsters, relents, clarifies, enhances, okays, complicates, hurts, defends, fortifies, tames, hardens, readies, stirs, removes, postpones, punishes, waives, smothers, extends, shortens, mulls, introduces, riles, ratchets, rejects, sweetens, modernizes, codifies, dampens, shrinks, warms, protects, clears, narrows, exempts, ousts, applies, rescinds, rips, angers, slows, stymies, spurns, abandons, girds, assails, reduces,