アルケーアルケーFreq.FrequencyTop 100,000Meanings1nounarche; first principlephilosophyPhilosophical term from Ancient Greek thought, referring to the fundamental substance or originating principle of the universe.from Ancient Greekタレスは万ばん物ぶつのアルケーを水みずと考かんがえた。Thales considered water to be the arche of all things.