Water that falls as rain, often collected and used for watering plants or other purposes.
Compound of 'rain' (from Old English 'regn') + 'water' (from Old English 'wæter'). It's a straightforward descriptive compound that's been used as long as people collected rain.
Rainwater harvesting was normal for most of human history and is having a renaissance now—ancient texts from India, Rome, and China all describe collecting rainwater systems, so our 'new' sustainable practice is actually ancient wisdom!
Complete word intelligence in one call. Free tier — 50 lookups/day.