Portuguese flag

Fedor vs. mau cheiro

The Portuguese words fedor and mau cheiro both refer to unpleasant smells, but they differ in tone, usage, and context. Understanding their nuances will improve your ability to use them appropriately in conversations or writing.

Fedor

B1
Fedor specifically refers to a very strong and unpleasant smell, often carrying a more negative connotation and used in informal or casual settings. It is typically associated with something almost unbearable or disgusting.
O lixo estava com um fedor insuportável.
(The trash had an unbearable stench.)
Depois da chuva, havia um fedor de esgoto na rua.
(After the rain, there was a stench of sewage on the street.)
A comida estragada deixou um fedor horrível na geladeira.
(The spoiled food left a terrible stench in the fridge.)

Mau cheiro

A2
Mau cheiro is a more neutral and slightly formal term that also refers to an unpleasant smell. It is often used descriptively and in contexts where the tone is less emotionally loaded or vulgar than fedor.
um mau cheiro vindo do banheiro.
(There’s a bad smell coming from the bathroom.)
A roupa ficou com mau cheiro porque não secou direito.
(The clothing ended up with a bad smell because it didn’t dry properly.)
Um mau cheiro tomou conta do ambiente após o vazamento de gás.
(A bad smell took over the place after the gas leak.)

Summary

Both fedor and mau cheiro describe bad smells, but fedor is more intense, emotional, and informal, typically used to describe truly revolting odors. In contrast, mau cheiro is a more neutral, formal way to describe something that smells unpleasant yet doesn’t carry the same emotional weight. Choosing the right term depends on the level of intensity and formality required.