緩和 （カンワ） relief, mitigation, alleviation, relaxation (of restrictions, tensions, etc.), easing, softening

緩急 （カンキュウ） high and low speed, fast and slow, pace, tempo, lenience and severity, emergency, crisis, dire situation

弛緩 （シカン） relaxation (e.g. of muscles), becoming flaccid

軍紀弛緩 （グンキチカン） lack of (slackness in) military discipline, demoralization

緩い （ゆるい） loose, lenient, lax, gentle (curve, slope, etc.), slow, weak, soft, not firm, difficult, hard

緩やか （ゆるやか） loose, slack, gentle (slope, curve), slow (speed), lenient, liberal, lax

緩やかに進む （ゆるやかにすすむ） to proceed slowly

緩む （ゆるむ） to become loose, to slacken (e.g. rope), to become less tense, to relax, to let one's guard down, to slacken (e.g. coldness, supervision), to become lax, to become softer (e.g. ground, facial expression), (of ice) to partially melt, to decrease (e.g. speed), (of a market price) to go down slightly

緩める （ゆるめる） to loosen, to slacken, to relax (attention, efforts, etc.), to let down (one's guard), to relieve (tension), to relax (a rule), to ease (e.g. restrictions), to loosen (control), to reduce (speed), to slow down, to ease up, to make more gradual (of a slope)