\ ˌhärd-ᵊn-ˈfast
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Definition of hard-and-fast
: not to be modified or evaded : strict
a hard-and-fast rule
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“Hard-and-fast.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hard-and-fast. Accessed 22 May. 2022.
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The first known use of hard-and-fast was in 1822
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