降ふり出だす

ふ

り

だ

す

JLPTN4Freq.FrequencyTop 100,000

降り出す · godan verb (-su)

Meanings

godan verb (-su), intransitive verb

begin to rain; begin to snow

Intransitive compound verb used when rain or snow starts falling. Often used with 雨 or 雪 as the subject.

〈物もの〉が降ふり出だすfor rain/snow to start falling
外そとに出でると雨あめが降ふり出だした。
When I went outside, it started raining.
突とつ然ぜん降ふり出だすto suddenly start raining/snowing
空そらが曇くもってきたと思おもったら、突とつ然ぜん雨あめが降ふり出だした。
The sky had just gotten cloudy when it suddenly started to rain.
〈物もの〉が降ふり出だす前まえにbefore the rain/snow starts
雨あめが降ふり出だす前まえに家いえに帰かえりたい。
I want to get home before it starts raining.

降ふるN5
降る simply states that rain or snow is falling, while 降り出す highlights the moment precipitation begins.
降ふり始はじめる
降り始める is a more literal, slightly formal way to say precipitation is starting, whereas 降り出す is the everyday idiomatic choice.

病やむN2
やむ means rain or snow stops, the direct opposite of 降り出す, which means it starts.

振ふり出だす
振り出す (same pronunciation) means to shake something out or to issue a bill/check, unrelated to weather, unlike 降り出す which is about rain or snow starting.

Compound of 降り (continuative form of 降る 'to fall') + 出す 'to start doing'. The 出す suffix adds the meaning of beginning an action.