Related Clues:

• Get used (to) (Var.)
• Harden (to) (Var.)
• Adjust to changes
• Toughen or harden
• Indurate
• Assimilate
• Make tough (Var.)
• Retool
• Become used to a new situation
• Acclimatize (Var.)
• Make accustomed to (Var.)
• Habituate (to)
• Become accustomed to (Var.)
• Naturalize
• Not stand still