An onomatopoeic adverb describing something soft, plump, or fluffy — full and gently rounded (e.g. a cushion, bread, cheeks). Often written in kana.
焼きたてのパンはふっくりしていて香りがいい。
Freshly baked bread is fluffy and smells great.
彼女はふっくりとした頬がかわいらしい。
Her plump cheeks are charming.
ふっくりとした餅の食感を楽しんだ。
I enjoyed the soft, plump texture of the mochi.