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Etymology
From.

Verb

 * 1)  to reduce, rebate, deduct (of price etc.)
 * 2)  to relax, loosen
 * 3)  to indulge sb
 * 4)  to cede, give away; ease
 * 5)  to abate, subside (of wind, current etc.)
 * 6)  to intermit (of pain, illness etc.)