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Rapidamente vs. rápido vs. velozmente vs. depressa

Word practice demo
The Portuguese words rapidamente, rápido, velozmente, and depressa all convey the idea of doing something fast or quickly, but they differ in tone, formality, and usage depending on the context.

Rapidamente

B1
Rápidamente is an adverb formed from the adjective rápido. It means quickly in a more formal and neutral sense, often used in writing or when describing actions in a measured, deliberate manner.
Ela completou o relatório rapidamente para enviá-lo ao chefe.
(She completed the report quickly in order to send it to the boss.)
O fogo se espalhou rapidamente pela floresta por causa do vento forte.
(The fire spread quickly through the forest because of strong winds.)

Rápido

A2
Rápido can function as both an adjective, meaning fast or quick, and occasionally as an adverb in informal language to mean quickly. It is versatile but more commonly associated with a casual or colloquial tone when used adverbially.
Ele é um corredor muito rápido.
(He is a very fast runner.)
Faça isso rápido antes que alguém perceba.
(Do this quickly before someone notices.)

Velozmente

B2
Velozmente is a formal and less commonly used adverb derived from veloz, which means swift or speedy. It emphasizes the impressive speed of an action and is primarily used in descriptive or literary contexts.
O cometa viajava velozmente pelo espaço infinito.
(The comet traveled swiftly through infinite space.)
O atleta correu velozmente até a linha de chegada.
(The athlete ran swiftly to the finish line.)

Depressa

A2
Depressa is a colloquial adverb meaning quickly or in a hurry. It is frequently used in informal or conversational settings to express urgency.
Anda depressa, estamos atrasados!
(Hurry up, we're late!)
Ele saiu de casa depressa para pegar o ônibus.
(He left home quickly to catch the bus.)

Summary

The words rapidamente, rápido, velozmente, and depressa all convey speed but differ in formality and nuance. Rápidamente is a formal and neutral adverb, typically used in writing. Rápido is versatile and can work as both an adjective (formal) and an adverb (informal). Velozmente is a literary, formal option often used for dramatic or descriptive emphasis. Depressa is highly colloquial and used to express urgency in everyday conversation.