In Jainism, the term sadhu refers to a male ascetic who has renounced worldly life and follows strict spiritual discipline. Within Jainism, there are primarily two main sects: Digambara and Svetambara, and both have their own traditions and classifications of sadhus (ascetics).

The term nirgranth sadhu is a general term for Jain monks, meaning “one who is free from all bonds.” Aside from this general designation, Jain ascetics are further classified according to their sect and specific practices:

1. Digambara Sadhus:

• Muni: A fully initiated Digambara monk who follows the Five Great Vows (Mahavratas) and possesses no personal belongings except for a peacock feather whisk (picchi) and a water pot (kamandalu).
• Aryika: A female ascetic in the Digambara tradition, who follows similar vows with some modifications.

2. Svetambara Sadhus:

• Muni: A fully initiated Svetambara monk who wears simple white clothes and follows the vows of non-violence, truth, non-stealing, celibacy, and non-possession.
• Sadhvi: A female ascetic in the Svetambara tradition, similar in discipline and vows to the male muni.

3. Other Classifications Based on Discipline:

Jain ascetics may also be classified by their stage of spiritual progress or specific lifestyle, such as:

• Upadhyaya: A teacher monk, responsible for teaching scriptures to other monks and laypeople.
• Acharya: The head or leader of an ascetic group, who guides the community in spiritual and ethical matters.
• Kshullaka/Kshullika (in Digambara): A junior monk or nun, who observes most but not all ascetic practices.

These are the main types of sadhus within the Jain tradition. The distinctions are primarily based on gender, sect, level of initiation, and specific roles within the monastic community. All Jain sadhus are expected to follow the path of renunciation, non-violence, and spiritual discipline as taught by the Tirthankaras.