Carecer vs. faltar
The words carecer and faltar in Portuguese both carry the sense of lacking or being in need of something, but they differ in their structure, usage, and focus on the subject in a sentence.
Carecer
B2Carecer means to need or to lack. It focuses on the subject directly—usually referring to the person or thing that is in need or lacking something. The entity or aspect that is missing is generally mentioned as part of the complement introduced by de.
Ela carece de paciência.
(She lacks patience.)
O país carece de recursos básicos.
(The country lacks basic resources.)
Este projeto carece de planejamento.
(This project lacks planning.)
Faltar
A2Faltar also means to lack or to be missing, but it shifts the focus to the thing or quantity that is missing, rather than directly emphasizing the subject. The person or thing experiencing the lack is typically expressed indirectly as a complement.
Faltam cinco reais para comprar o ingresso.
(Five reais are missing to buy the ticket.)
Faltou coragem para enfrentar o desafio.
(Courage was missing to face the challenge.)
Falta comida na casa dela.
(There is a lack of food in her house.)
Summary
While both carecer and faltar refer to the idea of lacking, carecer emphasizes the subject that is in need and usually requires de to specify what is missing. On the other hand, faltar focuses on what is missing, often portraying the affected person or thing indirectly.