wax and wane
Verb
Meaning
To progress cyclically through various phases, such as growth and senescence.
To alternate; to increase and diminish in turn.
The manifestation of such philosophy seemed to wax and wane, being the most common one time, but virtually without followers at another, apparently disappearing.
Synonyms
Examples
These tics characteristically wax and wane, can be suppressed temporarily, and are preceded by a premonitory urge.
It rarely, if ever, goes away without treatment, but symptoms may resolve from time to time or wax and wane spontaneously.
The two forces wax and wane their dominance but neither force ever wholly disappears from the imposition of the other.