膨(ふく)らむto expand, to swell (out), to get big, to become inflated

木(き)の芽(め)がプックリと膨(ふく)らんでいます。

The buds on the tree are plump and swollen. {to expand, to swell (out), to get big, to become inflated}

オーブンの中(なか)でマフィンがふっくらと膨(ふく)らんでいる。

The muffins are puffing up nicely in the oven. {to expand, to swell (out), to get big, to become inflated}

荷物(にもつ)を沢山(たくさん)詰(つ)め込(こ)んだので、鞄(かばん)がパンパンに膨(ふく)らんでいる。

Since I've stuffed a lot of things into it, the bag is bulging. {to expand, to swell (out), to get big, to become inflated}

借金(しゃっきん)が膨(ふく)らんでいるからといって人生(じんせい)が真(ま)っ暗(くら)だというわけではない。

Just because your debt is growing does not mean your life is completely dark. {to expand, to swell (out), to get big, to become inflated}

結婚式(けっこんしき)の予算(よさん)が膨(ふく)らんだものの、人生(じんせい)に一(いち)度(ど)のイベントなので後悔(こうかい)はしていません。

Although the budget for the wedding ballooned, I have no regrets because it's a once-in-a-lifetime event. {to expand, to swell (out), to get big, to become inflated}