All one's natural lives is a phrase that means throughout one's entire life. Some synonyms for this phrase include; until one's dying day, for all time, eternally, endlessly, perpetually, continuously, unfailingly, without interruption, without exception, without letup, and nonstop. Each of these phrases indicates a permanent state of being, expressing a commitment or dedication that remains constant throughout an individual's existence. Whether it's a vow of love, a dedication to a profession, or a pledge to a belief system, these synonyms illustrate the unwavering commitment that persists from birth until death.