"Agnostical" is a rarely used adjective derived from "agnostic," which refers to a person who believes that the existence of God or any ultimate reality cannot be known. The word is spelled with two "g's," following the standard English spelling of "-ic" endings. Its phonetic transcription in IPA is [æɡˈnɑstɪkəl], with stress on the second syllable. Despite its relative obscurity in modern usage, "agnostical" is a legitimate word recognized by some dictionaries, and is occasionally employed in philosophical or theological discourse.
The word "agnostical" is not found in any established dictionaries or recognized linguistic sources. It appears to be a neologism, a newly coined term, perhaps derived from the word "agnostic" which refers to someone who believes that the existence of God or a divine being is unknown or unknowable. Since "agnostical" is not a commonly used word, its etymology cannot be definitively determined.