moriaがるgarumoりあがるriagaru
1.

To increase in intensity or excitement, often in relation to a mood or atmosphere, reflecting a growing enthusiasm or interest in a situation or event.

2.

To physically elevate or protrude, resembling a pile or mound, as seen in the way muscles may appear more pronounced or how soil can become heaped.

3.

To reach a peak or climax in entertainment, such as in a performance or film, where interest and engagement are at their highest point.

4.

To erupt with a strong, unavoidable force, suggesting a spontaneous and vibrant reaction, typically associated with popularity or collective spirit.

Example:

火山活動で地面が盛り上がった。