You live with a censor in your head. If the censor doesn't like a specific word, you cannot say it. Your vocal muscles tense, then freeze like iron, causing you

You live with a censor in your head. If the censor doesn't like a specific word, you cannot say it. Your vocal muscles tense, then freeze like iron, causing you pain. Or perhaps they begin to repeat the same motions, uselessly, until you stop talking. This list of words changes over time and circumstance, but some sounds might be reliable predictors of problems. The way around that is to find some other word to use to express yourself. Or stop talking as much as possible.