英语词源字典 - 在线词源网站

flood (v.)[flood 词源字典]: 1660s, "to overflow" (transitive), from flood (n.). Intransitive sense "to rise in a flood" is from 1755. Related: Flooded; flooding.[flood etymology, flood origin, 英语词源]
island (n.): 1590s, earlier yland (c. 1300), from Old English igland "island," from ieg "island" (from Proto-Germanic *aujo "thing on the water," from PIE *akwa- "water;" see aqua-) + land (n.). Spelling modified 15c. by association with similar but unrelated isle. An Old English cognate was ealand "river-land, watered place, meadow by a river." In place names, Old English ieg is often used of "slightly raised dry ground offering settlement sites in areas surrounded by marsh or subject to flooding" [Cambridge Dictionary of English Place-Names]. Related: Islander.
Trent: river in England, a Celtic name, perhaps "great wanderer," in reference to its flooding. The city in Italy (Italian Trento) is Roman Tridentum, in reference to the triple-peaked mountain nearby. The great ecumenical council there was held from 1543-63.