むっくり

also: むくり

む

っ

く

り

Meanings

adverb, adverb taking the 'to' particle

abruptly (rising); suddenly getting up

onomatopoeic or mimetic word

Describes a sudden, somewhat heavy or clumsy rising motion, often from a lying or sitting position.

adverb, adverb taking the 'to' particle

slowly (rising); heavily getting up

onomatopoeic or mimetic word

Original meaning; implies a slow, ponderous rising motion, often with a sense of weight or effort.

adverb, adverb taking the 'to' particle, noun or participle which takes 'suru'

onomatopoeic or mimetic word

Only with reading むっくり

Describes a plump, round body shape; often used for babies, animals, or cute, chubby figures. Restricted to the reading むっくり.

むくむく
むくむく also describes plumpness or swelling, but often implies a softer, more fluffy or growing appearance, while むっくり emphasizes a round, solid plumpness.
がばっと
がばっと means 'suddenly getting up' with a more vigorous, energetic motion, whereas むっくり suggests a heavier, more lumbering rise.

Mimetic word; the geminated form むっくり likely emphasizes the abruptness or plumpness compared to むくり. The exact origin is uncertain.