grave problema

You usually place the adjective grave before the noun problema. This adds a bit of dramatic weight. You can say temos um grave problema (we have a grave problem). It works with the verb ser (to be) or ter (to have). It is very flexible. You can use it for health, money, or work. Just remember to sound a bit concerned when you say it!

Use it in a professional meeting if a project is failing. Use it at the doctor if a symptom is worrying. Use it with your partner if the pipes burst in the kitchen. It is perfect for news reports or serious discussions. If you are texting a friend about something truly bad, this fits. It signals to the listener: 'Hey, pay attention, this is big.'

Do not use it for trivial things. If you ran out of milk, it is not a grave problema. That would sound very sarcastic or overly dramatic. Avoid it in lighthearted jokes unless you want to be funny. If a friend is five minutes late, do not use this. Use pequeno imprevisto (small unforeseen event) instead. Keep this phrase for when things actually go wrong.

Portuguese speakers can be quite expressive and emotional. However, when someone says grave problema, the room usually goes quiet. It is a phrase that commands respect and focus. In Brazil, people might use slang for problems, but grave remains the standard for 'official' trouble. It has a Latin root that connects to 'gravity' or 'weight.' You are literally saying the problem has a lot of weight.

You might hear problema grave as well. Putting the adjective after the noun is also correct. It is slightly less dramatic but means the same thing. People also say seríssimo problema for extra emphasis. In casual speech, you might hear problemão (big problem). But grave problema is the most 'correct' and impactful way to say it. It sounds mature and clear.