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Expirar vs. vencer vs. caducar

Word practice demo
The Portuguese words expirar, vencer, and caducar all convey the idea of something becoming invalid or losing its effect, like a contract, passport, or visa. However, they are used in different contexts and carry nuanced meanings. This article explores their differences with practical examples.

Expirar

B1
Expirar is used to signify the literal expiration or end of a time period, often for official documents, events, or things with a definite time limit. It implies reaching a natural end point.
O meu passaporte vai expirar no próximo mês.
(My passport will expire next month.)
O prazo para se inscrever no curso expirou ontem.
(The deadline to enroll in the course expired yesterday.)
O seu visto já expirou?
(Has your visa already expired?)

Vencer

A2
Vencer refers to the due date or expiration of something, particularly payments, contracts, or obligations. It subtly focuses on the legal or financial aspect of the situation.
A conta da luz venceu ontem.
(The electricity bill was due yesterday.)
O prazo para pagamento da multa vai vencer na próxima semana.
(The deadline to pay the fine will be due next week.)
O contrato de aluguel vence no final do mês.
(The rental contract expires at the end of the month.)

Caducar

B2
Caducar indicates something becoming invalid, null, or obsolete, often due to a lack of action, relevance, or failure to follow through. It suggests the thing has lost its validity as a natural consequence.
O acordo entre as empresas caducou por falta de execução.
(The agreement between the companies lapsed due to lack of execution.)
O contrato vai caducar se não for renovado até dezembro.
(The contract will become null if not renewed by December.)
A garantia do produto já caducou.
(The product warranty has already expired.)

Summary

In Portuguese, expirar, vencer, and caducar all refer to expiration but have distinct uses. Expirar relates to the natural end of a time period, often for official documents. Vencer focuses on due dates for obligations like contracts or bills. Finally, caducar conveys the idea of something becoming invalid or obsolete due to inaction or circumstance. Understanding their contexts ensures more precise communication.