In Jainism, "Badhi Navkarvali" (also spelled "Badi Navkarvali" or "Badhi Navkar Vali") refers to a special form or rendition of the "Navkar Mantra" (Namokar Mantra), which is the most fundamental and revered mantra in Jainism. The term "Badhi" in Gujarati or Hindi typically means "extended" or "elaborated." Therefore, "Badhi Navkarvali" denotes an extended or elaborate recitation of the Navkar Mantra.

In practice, Badhi Navkarvali involves chanting the Navkar Mantra multiple times, often with increased numbers for each subsequent recitation (for example: 1, 3, 5, 7, 9, 11, 21, 27, 108, etc.), or in a specific sequence or pattern. This extended chanting is believed to multiply the spiritual benefits and is often performed as a penance (tapasya), for atonement (pratikraman), or to seek blessings.

The spiritual significance of this practice is rooted in the Jain belief that reciting the Navkar Mantra with devotion helps reduce karma, purifies the soul, and brings peace and spiritual progress.

In summary: Badhi Navkarvali is the practice of reciting the Navkar Mantra in an extended and repeated manner for spiritual upliftment and reduction of karmic bondage in Jainism.