緩和【かんわ】
relief, mitigation, alleviation, relaxation (of restrictions, tensions, etc.), easing, softening
緩やか【ゆるやか】
loose, slack, gentle (slope, curve), slow (speed), lenient, liberal, lax
緩急【かんきゅう】
high and low speed, fast and slow, pace, tempo, lenience and severity, emergency, crisis, dire situation
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
緩慢【かんまん】
slow, sluggish, dull, lax, sloppy, lenient
緩衝地帯【かんしょうちたい】
buffer zone
緩い【ゆるい】
loose, lenient, lax, gentle (curve, slope, etc.), slow, weak, soft, not firm, difficult, hard