This is the 10455th most frequent Portuguese word.
falho
"Falho" means "flawed" or "defective" in English.
In this sentence, 'falho' is used to describe the plan as being imperfect or containing flaws.
Meu plano inicial parecia bom, mas ele é falho em muitos aspectos.
My initial plan seemed good, but it is flawed in many aspects.
Here, 'falho' (in its feminine form 'falha') is describing the memory as unreliable or deficient.
A memória dele se mostrou falha durante o julgamento.
His memory proved to be faulty during the trial.
In this example, 'falho' is used to describe the equipment as not functioning properly or being defective.