: ability or power to be Energetic : toughness of system or intellect to complete things or to work a teacher of wonderful intellectual energy The rise of agriculture commenced to vary that condition of affairs. From the land of Sumer (in what is now Iraq) the creation of irrigation https://freeinsulationscotland.news.blog/2025/07/20/home-energy-scotland-grant-free-insulation-what-you-need-to-know/