Lull (noun)

1. A period of calm or quietness, especially in a storm.
2. A temporary period of reduced activity or tranquility.
3. A temporary period of sleep or rest.

Origin:

Middle english (in the sense 'sleep'): from old norse lulla 'to sing to sleep', of imitative origin.

Examples:

1. The wind died down, and a lull in the storm allowed us to escape the rain.
2. The lull in the fighting allowed the medical team to evacuate the wounded.
3. The teacher used the lull in the lesson to ask the students questions.
4. The lull in the conversation gave her a moment to catch her breath.
5. The baby drifted into a lull, finally exhausted after a day of playing.