ころkoroがるgaru
1.

To move or progress while spinning or rotating, often associated with round objects like balls that travel across surfaces in an unsteady manner.

2.

To fall over or become horizontal, indicating a transition from an upright position to lying down or falling down.

3.

To lie down or recline in a relaxed manner, often used to suggest a comfortable position, such as resting on a bed.

4.

To exist in a scattered or disorganized manner, often referring to items that are left lying about without care or arrangement.

5.

To indicate that the direction or course of a situation has changed, suggesting a shift in the way things are progressing or unfolding.

Example:

車輪はゆっくり転がり始めた。

ねころ寝転nekoroがるgaru
1.

To recline or lie down in a relaxed manner, often implying a casual or comfortable position, such as stretching out on the floor or grass.

2.

To roll oneself over onto a surface and settle into a resting position, suggesting a sense of ease and leisure.

3.

To throw oneself down onto a surface, typically in a carefree or unceremonious way, conveying a feeling of relaxation or fatigue.

Example:

彼は芝生の上に寝転がっている。