1. Godan verb with 'ru' ending, Intransitive verb

   to be duplicated; to be repeated

   see ダブル

   今、キーボードがダブって見えるぐらい酔ってます。

2. to overlap; to fall together (of dates, etc.); to coincide

3. to repeat (a failed course, school year, etc.)

4. to make a double play

   Baseballsee ダブルプレー

5. to make a double fault (in tennis)

   Sportssee ダブルフォールト

Also written だぶるdaburu