due

In a sentence

• La perte est due à une mauvaise gestion.

  The loss is due to poor management.

  Here, 'due' is used as part of the French phrase 'est due à', meaning 'is due to', indicating causality.

• Elle a terminé son travail avant la date due.

  She finished her work before the due date.

  In this sentence, 'due' is used as an adjective meaning 'required' or 'expected', describing the noun 'date'.

• Le montant dû est précisé sur la facture.

  The amount due is specified on the invoice.

  'Dû' functions here as an adjective meaning 'owed', applied to indicate an amount that needs to be paid.