Crossword puzzle clue "toughens up"

Here are the possible solutions for toughens up clue

Answer
Clue
Relevancy
anneals
Clue
Toughens
Toughens, as metal
Definition
ANNEAL, to make (as steel or glass) less brittle by heating and then cooling
ensteels
Clue
Toughens up
enures
Clue
Toughens
Definition
ENURE, to accustom or habituate to, also INURE
inures
Clue
Toughens
Toughens by exposure
Definition
INURE, to accustom oneself to accept unpleasant things
steels
Clue
Toughens
Toughens (oneself)

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