Poeirento vs. empoeirado
While both poeirento and empoeirado translate to "dusty" in English, they denote different states. Poeirento usually describes an environment or nature where dust is present in the air or generates dust, whereas empoeirado describes an object or surface that has collected a layer of dust over time.
Poeirento
B2This adjective describes the intrinsic nature or characteristic of a place, road, or atmosphere. It is used when dust is frequent, suspended in the air, or when something naturally generates dust.
O carro levantou uma nuvem de areia na estrada poeirenta.
(The car raised a cloud of sand on the dusty road.)
Eu não consigo respirar bem neste quarto poeirento.
(I cannot breathe well in this dusty room.)
O verão foi muito seco e poeirento este ano.
(The summer was very dry and dusty this year.)
Eles trabalham em um arquivo antigo e poeirento.
(They work in an old and dusty archive.)
Empoeirado
B1This word describes a temporary condition or state resulting from neglect or time. It is used for specific objects, furniture, or surfaces that are covered in a layer of settled dust because they have not been cleaned.
Ela encontrou um livro empoeirado na prateleira mais alta.
(She found a dusty book on the top shelf.)
Precisamos limpar aquele espelho empoeirado no corredor.
(We need to clean that dusty mirror in the hallway.)
Tirei minhas botas empoeiradas do armário.
(I took my dusty boots out of the closet.)
Os móveis ficaram empoeirados depois de meses sem uso.
(The furniture got dusty after months of non-use.)
Summary
Use poeirento when describing a place filled with dust or an environment that feels dusty (like a dirt road or stuffy air). Use empoeirado when pointing out an object that needs cleaning because a layer of dust has settled on top of it (like a forgotten box or shelf).