The government is toughening antidrug laws.
weight lifting will help toughen those flabby muscles of yours
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In the nineties, hip-hop was toughening up the sound of American popular music; Jackson, fey and theatrical, seemed increasingly distant from the cultural mainstream.—Kelefa Sanneh, New Yorker, 20 Apr. 2026 Silver chrome and chain-link details toughen up an otherwise serene, jade green set.—Ariel Wodarcyk, InStyle, 12 Apr. 2026 Because the muscles in this area are not overly exerted, their tendons don't toughen (which is why a tenderloin is so tender).—Sheena Chihak, Better Homes & Gardens, 10 Apr. 2026 Scheffler started hot but cooled off as conditions toughened later in the day.—Marley Malenfant, Austin American Statesman, 10 Apr. 2026 See All Example Sentences for toughen