This is the 12902nd most frequent Portuguese word.
ácido
"Ácido" means "acid" in English, referring to a substance with a sour taste and a pH less than 7.
Here, the word 'ácido' is used as an adjective to describe the taste (sourness) of lemon juice.
O suco de limão é muito ácido.
Lemon juice is very acidic.
In this sentence, 'ácido' refers to a chemical compound, specifically sulfuric acid, showing its usage as a noun.
O pesquisador analisou a composição do ácido sulfúrico.
The researcher analyzed the composition of sulfuric acid.
In this example, 'ácido' is used metaphorically as an adjective to describe a sharp or harsh comment, indicating bitterness or criticism.