Hi, Noted your short history about interrupted speech, embarrassment in front of friends and other people, feels you can not speak that particular word and thus wants advise. It is good to know that you are grown up and still have the problem you have mentioned. In most of the cases the problem is psychological and needs the following. Most of the people having such problems find the solutionand the examples are great people with similar problems like Tom Cruise and few singers I know. While they are engaged into the things of their choice they do not miss a single word. This means this is totally a psychological affection, related to stress and anxiety. Get a counselling by a Neurologist, ENT Surgeon and a Psychiatrist. Get examination done, MRI of the brain to rule out any problem near the speech center. Take the help of a Psychiatrist and a Speech Therapist and you will find a great difference. Hope I have answered your query. Let me know if I can assist you further. Regards, Dr. T. Chandrakant, ENT and General Surgeon