noun
rainy season; wet season
Refers to a period of abundant rainfall, often in contrast to a dry season. Used in contexts like agriculture, water resources, and climate.
この地域の豊水期は6月から9月までです。
The rainy season in this region is from June to September.
乾季 means 'dry season' and is the opposite of 豊水期.
Compound of 豊水 (abundant water) and 期 (period). The exact historical derivation is uncertain, but the term is transparently formed from its components.