"O pai não permitiu."

Translation: The father did not allow.

[soulzy]

the sentence is not complete - should be "the father did not allow/permit it" - without the "it" at the end, its wrong.

[aniger]

Soulzy is correct - in English we have to add "it" if we are not going to go on to specify what was not allowed or permitted.

[Lingodingle]

Right. That verb takes a direct object.