Ex-cogitated means to think deeply and carefully about something. Antonyms for ex-cogitated would be words that are opposite in meaning, such as ignore, neglect, or disregard. These words suggest a lack of attention or consideration towards a topic or idea. While ex-cogitated implies a level of focus and reflection, antonyms like ignore and neglect suggest a lack of interest or importance. So, if you are trying to convey a message that urges others to pay attention to something, using the opposite of ex-cogitated may not be the best approach. Instead, consider using synonyms that emphasize the importance of careful thought and consideration.