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Teams will use the five-week gap between the races in Japan and Miami to knuckle down at their factories and develop car upgrades that could boost their fortunes upon returning to the track in May.—Luke Smith, New York Times, 8 Apr. 2026 In survival mode, many brands have been forced to knuckle down and fortify their business strategies, in hopes of setting them up for success against a difficult backdrop.—Madeleine Schulz, Vogue, 10 Mar. 2026 European countries need to knuckle down and increase their military capabilities while Russia is still dedicating a chunk of its forces to its invasion of Ukraine, Sweden's defense minister has said.—Ellie Cook — Reporting From Prague, Czech Republic, MSNBC Newsweek, 3 Sep. 2025 Bunnie is knuckling down to help women escaping domestic violence.—Lars Brandle, Billboard, 3 Sep. 2019