Doubtful and Undefined

Doubtful adjective - Not feeling sure about the truth, wisdom, or trustworthiness of someone or something.

Undefined and doubtful are semantically related. In some cases you can use "Undefined" instead an adjective "Doubtful".

Nearby Words: doubt, doubtless, doubting, doubtfulness, doubted

Undefined adjective - Not seen or understood clearly.

Doubtful and undefined are semantically related. Sometimes you can use "Doubtful" instead an adjective "Undefined".