pereng

Phonetic
[pɜ̆r̰ːrːːɜnŋ]
Sense 1
English: Translation
smoothly spinning; steadily rotating
English: Definition
Spinning or rotating rapidly, evenly, and continuously, without wobbling, interruption, or loss of balance; especially characteristic of a well-spinning top.
adjective
Sense 2
English: Translation
deeply asleep; sound asleep
English: Definition
In a deep, settled, and undisturbed state of sleep; difficult to rouse because sleep is continuous and profound.
adjective
Notes

The dictionary corpus itself already contains pereng a torog in the meaning “deep sleep.”

Notes:
The two senses share an abstract semantic image of smooth, uninterrupted continuation:

steady uninterrupted rotation
↔
deep uninterrupted sleep.