noun
a tough person who endures hardship or difficulty without complaining
verb
to endure hardship or difficulty without giving up
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In order to succeed in this competitive industry, sometimes you have to tough it out and persevere through the challenges.
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I know the training is intense, but you just have to tough it out if you want to make it to the finish line.
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Dude, I know this breakup is rough, but you gotta tough it out and move on.
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Life can throw unexpected obstacles at you, but you have to tough it out and keep pushing forward.