1. Second person singular form of the verb 'dever' (must/should) combined with the reflexive pronoun 'te' and the infinitive 'preocupar' (to worry). Expresses obligation or advice to someone to be concerned about something.
You should not worry about what others think.
Não deves te preocupar com o que os outros pensam.
2. A directive or imperative suggestion that someone ought to be anxious or concerned about a particular matter.
You must worry about your health.
Deves te preocupar com a tua saúde.