rainwater
UK[ˈreɪnwɔːtə]US[ˈreɪnˌwɔːt̬ɚ]
n
Water that has fallen as rain.
Morpheme Breakdown
rain
water
rain
water falling from clouds
water
clear liquid
Etymology
The word "rainwater" is a transparent compound formed from two elemental Old English nouns, regn and wæter. Both terms have deep Proto-Germanic roots (regna- and watōr respectively) and can be traced further back to the Proto-Indo-European base HrewH- (to flow, rain) and wódr̥ (water). The compound's logic is perfectly literal, directly describing water sourced from rain. Its formation follows the common Germanic pattern of combining two existing nouns to create a precise, concrete term for a specific natural substance, with the first element ("rain") modifying the second ("water").
Analysis
Structure: rain (water falling from clouds) + water (clear liquid)
- rain: From Old English regn, of Germanic origin, related to Dutch regen and German Regen. It functions as a noun used attributively to specify the type of water.
- water: From Old English wæter, of Germanic origin, related to Dutch water and German Wasser. It functions as the core noun, the substance being specified.
Examples
The garden is irrigated using a system that collects and stores rainwater.
Rainwater is generally considered soft water because it lacks dissolved minerals.
They installed a barrel to catch rainwater from the roof for washing the car.