Portuguese translation of the English word duty‐free

English → Portuguese
  
EnglishPortuguese (translated indirectly)Esperanto
(obligation)
dever
🔗 I struggle to do my duty.
(service; stint)
plantão
;
serviço
🔗 As Zerling went about his duties, the ladies sighed and made murmuring sounds.
(at large)
livre
(for nothing; gratis; free of charge)
grátis
🔗 Buy 4 videos and get 1 free!
(freestyle; optional; voluntary)
facultativo
laŭvola

EnglishPortuguese
duty dever
free aforrar; autónomo; de borla; desocupado; livre; soltar; vago

The word duty‐free could not be translated into the selected target language by us.