いねむ居眠inemuri
1.

The act of falling asleep while in a seated position, often unintentionally during an activity or while at rest.

2.

The phenomenon of unexpectedly dozing off while engaged in a task or during a journey, typically characterized by a brief lapse into sleep.

3.

A specific type of sleep characterized by a gradual loss of awareness and responsiveness, occurring during seated activities such as traveling or relaxing.

Example:

授業中に居眠りすることは許しません。

いねむ居眠inemuriうんてん運転unten
1.

A dangerous state of drowsiness that occurs while driving, leading to a lack of awareness and control over the vehicle.

2.

The act of unintentionally nodding off while operating a motor vehicle, posing significant risks to both the driver and others on the road.

3.

A form of driver fatigue characterized by short periods of sleep that disrupt safe driving, often resulting from prolonged wakefulness or monotony.

Example:

彼は居眠り運転をしていて事故を起こした。