noun-modifying (irregular), noun or participle which takes 'suru', intransitive verb
Describes a pleasantly round, plump shape, often for babies, animals, or body parts. Can be used prenominally or as a suru-verb.
赤ちゃんの丸々とした腕がかわいい。
The baby's plump little arms are cute.
この猫
This cat eats a lot and is chubby.
adverb, adverb taking the 'to' particle
Adverbial use meaning 'the whole of something' or 'completely'. Often used with verbs like 使う, 覚える, or 写す.
給料をまるまる使ってしまった。
I spent my entire salary.
教科書をまるまる一冊写した。
I copied the whole textbook.