Focus on intention:
* Unintentional: This implies speaking without conscious thought or purpose. For example, blurting out something without thinking.
* Spontaneous: This implies speaking impulsively, without pre-planning or hesitation.
* Impulsive: Similar to spontaneous, but often with a stronger connotation of acting on emotions.
Focus on speed and clarity:
* Rambling: This implies speaking quickly and without clear structure or focus.
* Hasty: This implies speaking quickly and without careful consideration.
* Mumbling: This implies speaking unclearly and softly, making it difficult to understand.
* Slurred: This implies speaking with a distorted pronunciation, often due to intoxication or physical limitations.
Focus on planning:
* Improvisational: This implies speaking without a prepared script, relying on the moment.
* Unprepared: This implies speaking without prior planning or knowledge of the subject.
Other possibilities:
* Careless: This implies speaking without paying attention to detail or accuracy.
* Casual: This implies speaking in a relaxed and informal manner, potentially lacking seriousness.
The most accurate opposite would depend on the specific context and the intended meaning of "deliberate."