'consoler' originates from Latin, specifically the word 'consolari', where 'con-' meant 'with' (intensive/com-) and 'solari' meant 'to soothe or comfort'.

'consoler' changed from Old French 'consoler' and Middle English forms such as 'consolen' and eventually became the modern English word 'consoler'.

Initially, it meant 'to soothe or comfort', and over time it developed the related noun sense of 'one who comforts' which is the current meaning.