Oiduus

Oiduus is a term used in Estonian folklore and mythology, generally referring to a state of being or essence that is inherent to all living things. It is not a physical object but rather a fundamental quality that gives life its vitality and uniqueness. This concept can be understood as a life force, a spirit, or a soul, though it may not perfectly align with Western interpretations of these terms. Oiduus is believed to be present from birth and can be influenced by an individual's experiences and actions throughout their life.

In traditional Estonian beliefs, the oiduus of a person or creature is considered precious and is often protected. Certain rituals and practices were believed to help maintain or strengthen one's oiduus, while others could weaken or damage it. The concept is intertwined with ideas of health, well-being, and the overall vitality of an organism. While not always explicitly defined, oiduus plays a subtle but significant role in understanding the traditional Estonian worldview concerning life and existence. It emphasizes an intrinsic value and energy that distinguishes the living from the non-living, and contributes to the individual character of each being.