Grammar › N3 · 06 Purpose, decisions and verb endings
〜出す: suddenly start to
N3 · 06 Purpose, decisions and verb endings
Says that an action starts suddenly.
Verb masu-stem + 出す. It often shows a sudden change: 泣き出す (burst into tears), 走り出す (break into a run). Compare 〜始める, which is plain and calm.
Examples
突然、赤ちゃんが泣き出した。
Suddenly the baby burst into tears.
雨が降り出したので、傘を買った。
It started raining, so I bought an umbrella.