ぴったんこ

adverb

perfectly matching; sticking tightly; in complete agreement

Onomatopoeic adverb describing a snug fit, close adhesion, or complete agreement. Often used in casual speech. Related to ぴったり, but with a more playful or emphatic tone.

See also: ぴったり

• このパズルのピースはぴったんこはまる。

  This puzzle piece fits perfectly.

• 二人ふたりの意い見けんがぴったんこ合あった。

  Their opinions matched completely.