Pare

You use it as a command. If someone is talking too much, you say pare. If someone is walking into a puddle, you shout pare. It is very versatile. You can use it alone for maximum impact. You can also add a preposition like de to stop a specific action. For example, pare de falar means "stop talking."

Use it in emergencies to prevent accidents. Use it in traffic while driving. Use it when you are overwhelmed and need a break. It is perfect for setting boundaries. In a restaurant, you might say it to a waiter pouring wine. Just a quick pare or pode parar does the trick. It is the ultimate verbal brake pedal.

Do not use it with your boss if you want a promotion. It can sound quite aggressive if your tone is sharp. Avoid using it with elders unless there is physical danger. If you want to be polite, use por favor alongside it. Without a soft tone, it sounds like a police officer giving an order. Don't use it to mean "quit a job"; use demitir-se instead.

In Brazil, pare is everywhere. The red stop sign is iconic. Interestingly, Brazilians often repeat words for emphasis. You might hear para, para, para! when someone is joking around. It shows a sense of urgency or playfulness. In Portugal, the usage is similar but often feels slightly more formal. It is a foundational word in the Lusophone world.

Para is the informal version used with friends. Pára (with the old accent) or Para is very common in speech. Parou! is a great variation. It literally means "It stopped!" but people use it to mean "Stop that right now!" It is very effective with children or rowdy friends. You might also hear chega, which means "enough."