ころkorobuまろmarobu
1.

To lose balance and collapse due to tripping over something or being pushed, often resulting in a sudden and uncontrolled descent to the ground.

2.

To change direction or circumstances in a way that is unexpected or unpredictable, especially referring to events taking a turn.

3.

To roll or move while turning over, suggesting a more dynamic motion rather than a simple fall.

4.

To suffer pressure or persecution that leads to a change of conviction or belief, particularly in a historical context regarding religious conversion.

5.

To engage in covert or transactional interactions, particularly referring to the discreet actions of performers or entertainers.

Example:

転んで手首を痛めました。

ねころ寝転nekorobu
1.

To position oneself horizontally on a surface, often in a relaxed or casual manner, typically resulting in a state of rest or leisure.

2.

To throw one's body onto the ground or a surface in a way that suggests relaxation or a carefree attitude, often associated with informal behaviors such as lounging or resting.

Example:

兄は芝生に寝ころんで何時間も怠けて過ごしたものだった。