Clue: Toughen or harden (Var.)
Toughen or harden (Var.) is a crossword puzzle clue that we have spotted 4 times. There are related clues (shown below).
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Recent usage in crossword puzzles:
- Universal Crossword - March 23, 2018
- Pat Sajak Code Letter - Feb. 3, 2013
- USA Today - March 11, 2011
- Universal Crossword - Oct. 23, 2005