Meaning
A man of his word
Example
Meu pai é um homem de palavra.
My father is a man of his word.
Origin
A direct literal phrase meaning 'a man who keeps his word.' It has no documented idiomatic origin beyond its plain meaning; it's simply a traditional expression of integrity in Portuguese culture.
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More idioms
Acertar na moscaTo guess correctly / To hit the nail on the headAmigo da onçaA fake/false friendAndar na linhaTo toe the line / To behave properlyArmar um barracoTo cause a public sceneRodar a baianaTo cause a public scene / To go ballisticArrumar sarna pra se coçarTo ask for troubleArrastar as asasTo hit on someone / To flirtAbrir o jogoTo come clean / To open upArregaçar as mangasTo roll up one's sleeves / To get to workAgarrar com unhas e dentesTo hold on for dear life / To seize an opportunity