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don't vs. doesn't

[dohnt] / doʊnt /

verb

  1. contraction of do not.

  2. Nonstandard except in some dialects. contraction of does not.

noun

  1. don'ts, customs, rules, or regulations that forbid something.

    The boss has a long list of don'ts that you had better observe if you want a promotion.

[duhz-uhnt] / ˈdʌz ənt /
  1. contraction of does not.