Bom vs. Bem in Portuguese: What’s the Difference?
Use bom to describe a noun as good and bem to describe how someone does something or how things are going.
Real Life Portuguese · 6 min read · Updated October 14, 2026
The short answer
Bom is an adjective meaning “good” when it describes a masculine singular noun. Its form changes to agree: bom livro, boa ideia, bons amigos, boas notícias. Think of it as telling you what a person or thing is like.
Use bom or boa to describe a noun
The opposite is mau or má (bad), which also agrees with the noun. Learn both adjectives in a complete phrase so the endings are tied to a real thing you want to describe.
É um bom restaurante.
It’s a good restaurant.
Ela teve uma boa ideia.
She had a good idea.
Eles são bons amigos.
They are good friends.
Use bem to describe how something happens
Bem is an adverb meaning “well.” It describes a verb, an adjective, or sometimes another adverb, so it does not change to match masculine or feminine nouns. The opposite is mal (badly or poorly).
Compare “um bom aluno” (a good student) with “ele estuda bem” (he studies well). In the first phrase, good describes a noun; in the second, well describes how he studies.
Você fala bem português.
You speak Portuguese well.
A gente dormiu bem.
We slept well.
A comida está bem quente.
The food is very hot.
Learn common expressions such as tudo bem
Some expressions use bem in a way that does not translate word for word. Tudo bem? is a common greeting or check-in, and tudo bom? is also heard in Brazil. “Estou bem” means “I’m well,” while “está tudo bem” means “everything is okay.”
When you are uncertain, look at the word the expression describes. If it is a noun, bom/boa may fit; if it describes an action or appears in a fixed phrase, bem may be the form you need. Some idioms should be learned as whole expressions.
Oi, tudo bem?
Hi, how are you? / Hi, everything okay?
Estou bem, obrigado.
I’m well, thank you. (speaker: man)
Foi um bom dia; trabalhei bem.
It was a good day; I worked well.
Put it into practice
Make two sentences about your day: one with bom/boa before a noun and one with bem after a verb. Compare these with the Real Life Portuguese greeting guide, then practice your routine with the app’s native audio.
Quick practice
Which Portuguese example matches “The food is very hot”?
Choose an answer to check yourself.
Keep practicing with the Real Life Portuguese app
Build on this guide with everyday expressions and native Brazilian audio. Choose iPhone, Android, or the web app.