1. to make a weak or half-hearted attempt at something; to try without much effort, energy, or conviction
He feebly tried to lift the heavy box but gave up immediately.
Ele tentou fracamente levantar a caixa pesada mas desistiu imediatamente.
2. to attempt something in a faint or ineffectual manner
She feebly tried to argue her point but lacked confidence.
Ela tentou fracamente defender seu ponto de vista, mas lhe faltava confiança.