Relating to or characterized by the belief that energy or force is the fundamental principle of reality, or advocating for energetic action and vitality.
From energetic (from Greek energeia 'activity, operation') plus -istic (from Greek -istikos, meaning 'of or relating to'). The suffix -istic suggests a systematic belief or practice, making this an adjective describing adherence to energy-based philosophy.
This word barely survives in modern English, but it represents a fascinating 19th-century philosophical movement that tried to explain everything through the lens of energy—predating our modern understanding of thermodynamics by trying to make 'activity' the ultimate building block of reality.
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