puissant

The word 'puissant' entered English in the 15th century from Middle French, where it meant "powerful." Its ultimate source is the Latin verb 'posse,' meaning "to be able," which is itself a contraction of 'potis' (able) and 'esse' (to be). This Latin root also gives us English words like 'potent' and 'power.' The semantic journey is direct: from the fundamental concept of "being able" in Latin, through the French form describing one who possesses that ability, to the modern English sense of possessing great might or authority, often with a literary or archaic flavor.

The word is a simplex loanword from French. It is not productively segmented using English morphemes. The French word 'puissant' derives from the Old French verb 'poeir' (to be able) and the suffix '-issant' (equivalent to English '-ant'), forming a present participle meaning "being able" or "having power."