neru
1.

To assume a horizontal position for rest or sleep, typically in a bed, allowing the body to recover or relax.

2.

To become inactive or motionless, as in the case of goods or funds that are not being utilized or generated.

3.

To engage in intimate physical proximity with another person, often in a shared sleeping arrangement.

4.

To transition from an upright position to lying down, either for the purpose of rest or due to external circumstances like strong winds.

5.

To indicate a state of maturity or readiness, particularly in the context of fermented products like miso or soy sauce, signaling that they have reached an optimal condition.

Example:

赤ん坊は1日中寝ていた。

neruじかん時間jikan
1.

The designated time when one goes to sleep, typically observed nightly as part of a routine.

2.

The interval during which a person engages in sleep, often associated with rest and rejuvenation.

3.

The specific hour at which an individual prepares to end the day's activities and transition into sleep.

Example:

そろそろ寝る時間だぞ。

nerumamooしんでshinde
1.

Prioritizing tasks or activities to the extent that one sacrifices sleep for them.

2.

Engaging in work or pursuits so fervently that there is no time left for rest or slumber.

3.

Embracing a commitment or passion so deeply that one forgoes the necessity of sleep to continue.