Related Clues:

• Toughen or harden (Var.)
• Make adjustments
• Modify to particular conditions
• Render harmonious
• Trim to fit, perhaps
• Suit yourself?
• Modify to new conditions
• Get used (to) (Var.)
• Harden (to) (Var.)
• Adjust to changes
• Toughen or harden
• Indurate
• Assimilate
• Make tough (Var.)
• Retool