She could not walk or speak intelligibly and was considered incontinent. She could not walk or speak intelligibly and was incontinent. The procedure failed, leaving Kennedy permanently incapacitated and rendering her unable to speak intelligibly. The character was originally meant to be incapable of speaking intelligibly. A moderate pace of speech enables a person to speak intelligibly. The articulation of voice enhances the resonance of speech and enables people to speak intelligibly. His face was frozen in a horrifying grin, leaving him unable to speak intelligibly.