does not swimWhen written as the exact contiguous sequence no nada, nada is usually the third-person singular form of nadar (“to swim”), not the pronoun nada (“anything/nothing”). To express “not anything,” Spanish normally separates no and nada with a verb, as in No veo nada (“I do not see anything”).
SP: No nada en el mar porque el agua está muy fría.
EN: He/She does not swim in the sea because the water is very cold.