くだkudaけるkeru
1.

To transform from a solid or structured form into smaller fragments or pieces due to impact or pressure, often resulting in destruction or disintegration.

2.

To lose stability or confidence, leading to a decline in initial enthusiasm or momentum, often described as becoming less assertive or composed.

3.

To adopt a relaxed or informal demeanor, becoming more approachable and relatable, sometimes to the point of appearing somewhat casual or less refined.

4.

To be in a state of emotional turmoil or confusion, reflecting a mind that is scattered or agitated by various thoughts or feelings.

Example:

花瓶は粉々に砕けた。