I think you’re asking about two Jain terms: Acharya and Nigraha (nigraha).

• Acharya: In Jainism, an Acharya is the senior spiritual teacher or head of a monastic community. He guides ordained monks and nuns, preserves the Jain canon and rituals, and ensures proper conduct (vinaya) within the sangha. Both Digambara and Śvetāmbara traditions honor the role of an Acharya, though the lineages and titles of teachers can differ between the two sects.

• Nigraha (nigraha): This term means restraint or self-control. For Jain monks, nigraha is central: they practice strict self-discipline to control senses, passions, and harmful actions. This complements the five major vows and other observances (like tapas, pratyakhanā, samayik) that help a Jain ascetic progress on the path to kevala jñāna.

If you meant a specific sutra, verse, or a particular context (for example, a line from a Digambara or Śvetāmbara text about Acharya or about nigraha), please share the exact wording and I’ll provide the original text (if requested) and the correct Jain interpretation (arth) along with any tradition-specific notes.