'acquiescent' originates from Latin, specifically the word 'acquiescere,' where 'ad-' meant 'to' and 'quiescere' meant 'to rest or be quiet.'

'acquiescere' transformed into the French word 'acquiescer,' and eventually became the modern English word 'acquiescent' through Middle English.

Initially, it meant 'to rest or be quiet,' but over time it evolved into its current meaning of 'willing to accept or agree to something without protest.'