This is the 9649th most frequent Japanese word.
膨らみ
"膨らみ" means "swelling" or "protrusion."
In this sentence, '膨らみ' is used to describe the visible bulge or inflated part of the balloon, indicating its physical state.
風船の膨らみが見えます。
I can see the balloon's bulge.
Here, '膨らみ' metaphorically expresses the swelling of the chest as an emotional response, showing pride.
彼の胸の膨らみは誇りを示していました。
His chest swell indicated pride.
In this case, '膨らみ' refers to the fluffy or risen texture of the cake, expressing its quality or appearance.