3 adjectives to describe changeless

The measure, deliberate, incessant, changeless,the same tones, the same intervals,worked upon his strained nerves, at first soothingly and then as a pleasant stimulant.

The measure, deliberate, incessant, changeless,the same tones, the same intervals,worked upon his strained nerves, at first soothingly and then as a pleasant stimulant.

She went on and on and felt like one in a dream, journeying into a fierce, rugged land over which lay a spell of enchantment, a spell that had been cast over it before King's all but immortal trees had burst from the seeds, so that now, while the outside world pulsed and beat with life, and swung back and forth with its pendulous progress, here all was unchanged, changeless.

3 adjectives to describe  changeless