もろmoroi
1.

Describes a state of being easily damaged or broken when subjected to external forces or pressure, such as materials that shatter or crumble under stress.

2.

Refers to a lack of emotional resilience or strength, indicating an inclination to be easily swayed or affected by feelings and circumstances.

3.

Indicates a vulnerability to sudden emotional responses, such as being prone to tears or sentimentality in various situations.

Example:

彼が作った模型飛行機はもろかった。