Toughens
Else clues• Abets user, in effect
• Accustoms
• Accustoms (to)
• Accustoms to hardship
• Accustoms, as to hardship
• Becomes accustomed (to)
• Becomes used (to)
• Gets accustomed (to)
• Gets used (to)
• Grows accustomed
• Habituates
• Hardens
• Hardens (to)
• Hardens, in a way
• Toughens by exposure
• Toughens up