Overfalls

Part of speech: noun

Definitions

1. A sudden and forceful surge of water, typically occurring in turbulent currents or rough seas
2. A location where waters collide violently against submerged objects, creating treacherous conditions for vessels
3. A rapid movement of water that occurs when currents converge or when waves break upon encountering obstacles beneath the surface

Etymology: "Overfalls" is the plural of "overfall", a noun for a rough, sudden surge of water where currents collide or waves break over submerged rocks or shoals. The surprise lies in the verb it grows from. Its ancestor, Old English "oferfeallan", meant "to fall upon, attack", so the sea's violent heave once carried the sense of an assault. The same idea survives in cognates such as Dutch "overvallen" ("to raid"), German "überfallen" ("to assault"), and Swedish "överfalla" ("to attack"). The word is built from "over" and "fall", and the sense of an onslaught came first. The plural form is the one most often used for a stretch of broken water rather than a single one, so it appears in sailing and pilotage talk about dangerous passages.

Synonyms: waterfalls, rapids, cascades, falls, drops