What's the adjective for quiescence? Here's the word you're looking for.
Included below are past participle and present participle forms for the
verbs quiet, quieten and quiesce which may be used as adjectives within certain contexts.
“The tumor is usually benign and remains histologically quiescent for a long period of time.”
“If they gained opprobrium for being a passive and quiescent movement, willing to cooperate with employers, it may have been particularly as a result of their actions during this period.”
“At that time, each larva wraps itself in a cocoon, plugs its chamber with silk, and becomes quiescent.”