noun or verb acting predominately, takes する

  1. plump, rotund, chubby.

adverb, adverb taking the と particle

  1. entirely, completely, wholly.

Variations

Pronunciation Kanji Kana Is Common
丸々 まるまる
丸丸 まるまる

Contained Kanji Breakdown

round, full (month), perfection
まる ガン ま (2nd, N2)
nine
キュウ ク ここの (1st, N5)
dot, tick or dot radical (no. 3)
チュ (Kentei 1)
repeated kanji symbol