膨れる
ふくれる · fukureru · JLPT N1 · verb-ichidan
to swell
🎈 Sounds like fukuro (bag): a bag stuffed too full swells out and becomes fukureru
膨 combines 月 (the flesh radical, as in body parts) with 彭 (the phonetic element). Flesh or a container that puffs outward, like cheeks or a belly, is fukureru.