The story
From Quiripi (Unquachog) seépus (“river”), cognate to Abenaki sibo (“river”), sibos (“brook, little river”).
Etymology from Wiktionary, CC BY-SA 4.0.
sea puss
Today it means: A strong seaward current; a riptide or undertow, especially as results when a sandbar formed by waves suddenly gives way, and which is dangerous to swimmers. Full definition →