The word "incogitantly" is not commonly used but it is an adverb that means to do something without thinking or consideration. It is spelled with the prefix "in" meaning not and the root word "cogitant" meaning thinking. The phonetic transcription of the word is ɪnˈkɒdʒɪtəntli. The stress is on the second syllable and there are three syllables overall. The "g" and "j" sounds are pronounced similarly in English.