rainout
UK[ˈreɪnaʊt]US[ˈreɪnaʊt]
n
A cancellation or postponement of a sporting event or outdoor activity due to rain.
n
The process or result of substances being washed out of the atmosphere or soil by rain.
Morpheme Breakdown
rain
out
rain
precipitation
out
completion/result
Etymology
The word "rainout" is a modern compound, formed within English by combining two native Germanic elements. The first element, "rain," descends from the Proto-Germanic regna-, which carries the core meaning of liquid precipitation. The second element, "out," originates from Proto-Germanic ūt, meaning "out" or "outside," and in compounds often signifies a resulting state or termination. The logic of the compound is transparently descriptive: an event that is "rained out" is forced to an end or cancelled because of rain. The secondary, scientific meaning—referring to the washing out of particles by rainfall—extends this core logic to a physical process, where substances are moved "out" of the air or a surface by the action of rain.
Analysis
Structure: rain (precipitation) + out (completion/result)
rain: From Old English regn, of Germanic origin, related to Dutch regen and German Regen. Functions as the core noun denoting the meteorological phenomenon.
out: From Old English ūt, of Germanic origin, related to Dutch uit and German aus. Functions as an adverbial particle indicating a result, conclusion, or external state.
Examples
The baseball game was declared a rainout after three hours of delay.
Due to the sudden downpour, the concert turned into a complete rainout.
Scientists measured the chemical composition of the rainout to assess atmospheric pollution.