'quiescent' originates from Latin, specifically the word 'quiescere,' where 'quiescere' meant 'to rest or be quiet.'

'quiescere' transformed into the Late Latin word 'quiescentem,' and eventually became the modern English word 'quiescent.'

Initially, it meant 'to rest or be quiet,' but over time it evolved into its current meaning of 'in a state or period of inactivity or dormancy.'