'aquench' originates from Middle English, specifically the word 'aqueken', where the prefix 'a-' meant 'on, in' (a common verbal prefix) and 'queken' (related to 'quench') meant 'to extinguish'.

'aquench' changed from Middle English 'aqueken', which itself developed from Old English forms such as 'cwencan' (or 'cwenċan') meaning 'to kill, to extinguish', ultimately tracing to Germanic roots related to the word 'quench'.

Initially, it meant 'to extinguish or kill'; over time the sense broadened to 'to quench' (including satisfying thirst and putting out fire), and the specific form 'aquench' became archaic in modern English.