This is the 10441st most frequent Portuguese word.
faca
Knife.
Here, 'faca' is used as a noun to refer to the cutting tool 'knife'.
Eu uso uma faca para cortar os legumes.
I use a knife to cut the vegetables.
In this sentence, 'faca' is part of the verb form 'faça', meaning 'do' as a subjunctive tense of 'fazer'.
Por favor, não faca isso novamente.
Please, do not do this again.
Here, 'faca' is used hypothetically, showcasing the potential or hypothetical aspect of the subjunctive verb tense.