noun
a firm grip or grasp
verb
to grip or grasp firmly
adjective
firmly secured in place
adverb
in a secure or unyielding manner
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In times of uncertainty, it is important to hold fast to your principles.
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When things get tough, just hold fast and keep pushing through.
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Dude, you gotta hold fast and not let anyone bring you down.
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She held fast to her dreams, refusing to let anyone deter her from achieving them.