adjective
incessant
in-SES-unt/ɪnˈsesnt/
Continuing without pause or interruption.
The incessant rain pours steadily without a break in the downpour.

Etymology
The negative prefix turns “ceasing” into “not ceasing.” The word describes something that keeps going without leaving off, rather than merely something that happens often.
In context
We tell the mind to become still because incessant thinking, incessant thinking is incessant chatter and it's useless chatter and it's damaging chatter.
More examples
- The incessant rain turns the trail into mud.
- We close the windows to escape the incessant barking.
- Her incessant questions leave him no time to answer.
Forms
incessant
incessantly adverb — Without any pause or interruption.
Similar words
- continuous
- Describes an unbroken stretch without suggesting annoyance or excess.
- unceasing
- Similarly means never stopping, but often sounds more formal.