1. to try to do something in a weak, half-hearted, or ineffective manner; to make an effort that lacks strength, conviction, or commitment
He made a feeble attempt to lift the heavy box, but quickly gave up.
Ele fez uma tentativa fraca de levantar a caixa pesada, mas rapidamente desistiu.
2. to try something without sufficient effort, resources, or determination to succeed
The team made only a feeble attempt to defend their title in the championship.
O time fez apenas uma tentativa fraca de defender seu título no campeonato.