Fetching details from the dictionary...

to swell (out); to expand; to be inflated; to distend; to bulge
to get cross; to get sulky; to pout
パンの生地が発酵して二倍に膨れた。
The bread dough fermented and swelled to twice its size.
雨で川の水量が膨れて危険な状態になった。
The river swelled from the rain and became dangerous.
借金が膨れて返済が難しくなってきた。
The debt has ballooned, making repayment increasingly difficult.