Related Clues:

• Make used to (Var.)
• Make immune, as to violence (Var.)
• Acclimate
• Adapt to rigors
• Toughen, as to hardship
• Become hardened (to)
• Get used to (Var.)
• Harden: Var.
• Make immune
• Cause to become hardened to
• Make accustomed (to)
• Accustom (var.)
• Temper, toughen
• Harden or season
• Harden or accustom as to something unpleasant