سست sust P adj. Loose, lax, relaxed, weak, frail, soft, lazy, negligent, slothful, idle, slow, tardy, inactive, dilatory, languid, feeble, indo- lent, remiss. سست اعتقاد sust-iﻌtiḳād, adj. Lax in confidence, incredulous, fickle. سست پيمان sust-paimān, adj. Unsteady to oneʼs en- gagement, fickle. سست کرنا sust karnā, v. a. To relax.