Search Result for "toughening": 
perl: warning: Please check that your locale settings:
	LANGUAGE = (unset),
	LC_ALL = (unset),
	LC_TIME = "tr_TR.UTF-8",
	LC_MONETARY = "tr_TR.UTF-8",
	LC_ADDRESS = "tr_TR.UTF-8",
	LC_TELEPHONE = "tr_TR.UTF-8",
	LC_NAME = "tr_TR.UTF-8",
	LC_MEASUREMENT = "tr_TR.UTF-8",
	LC_IDENTIFICATION = "tr_TR.UTF-8",
	LC_NUMERIC = "tr_TR.UTF-8",
	LC_PAPER = "tr_TR.UTF-8",
	LANG = "C"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
1 definitions retrieved:

The Collaborative International Dictionary of English v.0.48:

Toughen \Tough"en\, v. i. & t. [imp. & p. p. Toughened; p. pr. & vb. n. Toughening.] To grow or make tough, or tougher. [1913 Webster]