means Water that condenses in the atmosphere and falls to the ground in drops.

from From Old English 'regn,' a word with deep Germanic roots — a cousin of Dutch 'regen' and German 'Regen.' All of them likely trace back to a Proto-Germanic '*regna-,' which is why the rain in three languages still sounds like the same weather. The word has stayed remarkably unchanged for over a thousand years, perhaps because the thing it names never went out of style.