Elixir vitae, a Latin term for "elixir of life," refers to a hypothetical substance that can provide prolonged youth and longevity. The antonyms for elixir of life could be terms such as "poison," "toxic substance," or "harmful concoction." These antonyms represent the opposite of life-giving, rejuvenating properties of an elixir vitae. In reality, there is no such thing as a magic potion that can make one immortal or reverse aging. However, the pursuit of such an elixir has been an enduring theme in various myths, legends, and literature. In contrast, the antonyms of elixir vitae represent death, decay, and destruction- the opposite of what an elixir of life is supposed to achieve.