Divorce under Hindu law can be granted on three grounds: fault, mutual consent, or irretrievable breakdown of marriage. Fault-based divorce requires proving offenses like adultery, cruelty, desertion, etc. by one spouse. Consent divorce requires mutual agreement. Irretrievable breakdown divorce applies when spouses have lived separately for years and reconciliation is not possible. Additional grounds for wives include pre-existing polygamous marriages, certain physical/sexual offenses by the husband, and repudiation of underage marriages.