undertow (def 1).
A strong, narrow surface current that flows rapidly away from the shore. Rip currents form when excess water that has accumulated along a shore due to wind and waves rushes back suddenly to deeper waters. Also called rip tide.
adjective, riper, ripest. 1. having arrived at such a stage of growth or development as to be ready for reaping, gathering, eating, or use, as grain or fruit; completely matured. 2. resembling such fruit, as in ruddiness and fullness: ripe, red lips. 3. advanced to the point of being in the best condition for use, […]
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verb (used with or without object) 1. to make or become ripe. 2. to bring or come to maturity, the proper condition, etc.; mature. verb 1. to make or become ripe
noun, Diving. 1. an entry into the water with little splashing.