Hebrew

rpy - to grow slack (HALOT 1276)

PWS
*rpy - to relax (Kogan 2015: 121)
*rpˀ ‘to heal, to protect’ is probably connected perhaps also Arb. rfh - ‘to be easy, soft, delicate’ and Soq. bə-rέfɛy/bə-rέfɛš - ‘slowly, gently’