In Jainism, "jiv anadi sant" refers to the concept that the soul (jiva) is anadi (without beginning) and sanatan (eternal). This means that the soul has always existed and will always continue to exist; it was never created nor will it ever be destroyed.

The term "nigod" is related but refers to a particular type of existence. Nigod are a category of souls that exist in a very basic, microscopic form, experiencing the lowest form of existence with minimal consciousness and no spiritual progress. According to Jain beliefs, the majority of souls reside in the nigod state, experiencing countless cycles of birth and rebirth.

To summarize:

• Jiv anadi sant: Souls are beginningless and eternal.
• Nigod: A state where souls exist in the simplest, most undeveloped form, with very limited consciousness.

In Jain philosophy, the journey of a soul from nigod (lowest state) to liberation (moksha) illustrates the soul's eternal existence and its potential for spiritual evolution.