引っ越しの準備で思った以上に出費が嵩んだ。
Preparing for the move, our expenses mounted up more than I expected.
事業の失敗で借金が嵩み、家を手放すことになった。
His debts piled up after the business failed, and he had to give up his house.
お土産を買いすぎて荷物が嵩んでしまった。
I bought too many souvenirs, and my luggage became bulky.