—v.t. 1. to make hard; harden, as rock, tissue, etc.: Cold indurates the soil. 2. to make callous, stubborn, or unfeeling: transgressions that indurate the heart. 3. to inure; accustom: to indurate oneself to privation and suffering. 4. to make enduring; confirm; establish: to indurate custom through practice.
—v.i. 1. to become hard; harden.
2. to become established or confirmed.