Puissance is great power or influence, in old use. A man of puissance.
It is archaic in English and survives mostly in poetry and in show jumping. In show jumping the puissance is the event over the highest wall.
1nounpuissanceGreat power or influence, in old use.
“The puissance of that family lasted three generations.”
puissance is a power.
Old French puissance comes from puissant, powerful, from Latin posse, to be able.
Old French
puissant — powerful
Anglo-Norman
puissance
Middle English
puissaunce
English, today
puissance
From Middle English puissaunce, from Anglo-Norman puissance, pusaunce, and other forms, from Old French puissant (“powerful”).
Etymology from Wiktionary, CC BY-SA