ダブる

だぶる
godan verb
to repeat a grade; to overlap; to duplicate
1. to repeat a grade; to be held back
To fail to advance to the next school year and have to repeat the same grade.
大学(だいがく)でダブった。
I had to repeat a year in college.
このまま()くとダブるかも。
At this rate, I might have to repeat the year.
ダブらないように頑張(がんば)る。
I'll work hard so I don't have to repeat.
2. to overlap; to duplicate; to double up
For things to be duplicated or for schedules to conflict.
予定(よてい)がダブっている。
My schedules are overlapping.
カードがダブった。
I got a duplicate card.
(おな)(ほん)がダブって()ってしまった。
I accidentally bought the same book twice.

ダブる comes from the English word "double." It's a casual verb formed by adding る to the loanword.

REGISTER:
This is casual/colloquial language. For sense 1, formal alternatives include 留年(りゅうねん)する. For sense 2, use 重複(ちょうふく)する or (かさ)なる.

COMMON PATTERNS:

  • ダブる: to repeat/overlap
  • ダブり: duplication (noun form)
  • 予定(よてい)がダブる: schedules conflict