(每日一词）precipitation

Precipitation  /priːˌsɪp.əˈteɪ.ʃən/ n. （尤指雨或雪的）降落；降水

meaning: water that falls from the clouds towards the ground, especially as rain or snow 

1) 前缀：pre-向前

2) 词根：cipit- 头（capital 首都）

3) 后缀：-ation 名词后缀

e.g. The forecast is for dry, cloudy weather with no precipitation expected. 天气预报是干燥多云，没有降水。