おっ

prefix

vigorously; suddenly; with force

Emphatic verbal prefix used before verbs to add a sense of doing something vigorously, suddenly, or with force. Common in colloquial and informal speech. Often written in kana.

• 彼かれはおっ走はしって教きょう室しつを出でていった。

  He suddenly dashed out of the classroom.

• おっかぶせるように布ふ団とんをかけた。

  I threw the blanket over him vigorously.