prathamyoga7 – https://www.prathamyoga.com/blog/define-mantra-meaning-and-definitions

What is Mantra is a profound concept rooted in ancient Indian spiritual traditions, especially within yoga, meditation, and Vedic philosophy. A mantra is a sacred sound, word, syllable, or phrase that is repeated verbally or mentally to focus the mind and awaken higher states of awareness. The term itself comes from Sanskrit, where “man” means mind and “tra” means tool or instrument—together signifying a tool for the mind. Mantras have been used for thousands of years by sages and practitioners to calm mental fluctuations, cultivate inner silence, and connect with universal energy. Whether chanted aloud, whispered, or repeated silently during meditation, mantras help redirect scattered thoughts and bring the practitioner into a state of mindfulness and inner harmony. Famous examples such as “Om,” “So Hum,” and various Sanskrit bija (seed) mantras are believed to carry specific vibrational frequencies that influence both the mind and body on a subtle level.