ふくfukuれるreruふくfukuれるreru
1.

To undergo a change in shape or volume, becoming larger and more prominent due to internal pressure or an increase in content.

2.

To increase in size or scale gradually, often used to describe a situation or a group growing larger over time.

3.

To express discontent or dissatisfaction physically by puffing up one's cheeks or altering facial expressions in response to criticism or frustration.

4.

To experience a feeling of fullness or overwhelming emotion, often associated with joy or excitement, resulting in a metaphorical expansion of one's heart.

Example:

たくさん食べたので腹が膨れた。