'commendably' originates from the Latin word 'commendabilis', where 'commendare' meant 'to entrust or commit'.

'commendabilis' transformed into the Old French word 'comendable', and eventually became the modern English word 'commendable', with 'commendably' as its adverbial form.

Initially, it meant 'worthy of being entrusted or committed', but over time it evolved into its current meaning of 'deserving praise'.