-nt adjective
Etymology: Middle English puissaunt, from Middle French puissant, from Old French, from puiss- (stem of poer, poeir to be able) + -ant — more at power
: of great force or vigor : strong , powerful
one of the nation's most puissant labor leaders — Time
called on all the puissant stamina of her mother — Adria Langley
though not a puissant colorist, secured some … beautiful effects — Royal Cortissoz
• pu·is·sant·ly adverb