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toughener
toughener n. 
/ˈtʌf(ə)nə(r)/ one who or that which toughens.
/ˈtʌf(ə)nə(r)/ one who or that which toughens.ΘΚΠ
the world > life > the body > bodily constitution > bodily strength > strengthening > [noun] > one who or that which > who or which makes robust or tough
toughener1895
1895 C. W. Lyman in Voice (N.Y.) 5 Dec. 7/2 Recommended as a toughener of the constitution.
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