IPA: //ˈreɪniər//
KK: /ˈreɪniər/
More rainy than something else; having more rain.
This month has been rainier than last month, with many more storms.
Rainier → The word 'rainier' is derived from 'rain' (from Old English 'regn', meaning water droplets falling from the sky) and the suffix '-ier' (meaning more). Thus, 'rainier' describes a condition of having more rain.
Think of 'rain' as water falling from the sky, and '-ier' indicating a greater amount. So, 'rainier' means a place that has more rain.