adverb, adverb taking the 'to' particle
Describes eating with gusto, a big appetite, or consuming food in large quantities. Often used with verbs like 食べる.
子供たちは給食をもりもり食べた。
The children ate their school lunch heartily.
adverb, adverb taking the 'to' particle
Used for working, moving, or doing something with great energy and enthusiasm. Common with verbs like 働く or 進む.
彼は朝から晩までもりもり働く。
He works energetically from morning till night.
adverb, adverb taking the 'to' particle, noun or participle which takes 'suru'
bulging (muscles); welling up (strength, courage)
Describes muscles swelling or strength/courage rising powerfully. Can be used with する to mean 'to bulge' or 'to well up'.
腕の筋肉がもりもりしている。
His arm muscles are bulging.
勇気がもりもりと湧いてきた。
Courage welled up vigorously.