〜だす

Meaning

〜だす has two main meanings: (1) It describes an action that suddenly begins, emphasizing the abruptness of the action's occurrence. Unlike 始める (hajimeru), this pattern stresses the sudden, unexpected nature of the action. (2) It means to bring something outward or into existence—to produce or create something new.

Formation

Examples

1. 赤ちゃんは急に泣き出した。
   The baby suddenly started crying.

2. 静かな図書室で、あの男の人が急に歌いだして、図書館員に注意されました。
   In the quiet library, that man suddenly started singing and was warned by the librarian.

3. 最初に自動車を作り出した人はとてもすごいと思います。
   I think the person who first produced the automobile was truly amazing.

Summary

• Use ます-form verb + だす to show sudden action onset with emphasis on abruptness
• Examples 1-2 show sudden beginning of action; Example 3 shows bringing something into existence
• Different from 始める—だす highlights the unexpected, sudden quality rather than just marking a start point