After the verb car 'to walk' preceded by ut , when used intransitively, the ātmanepada is used.,
As गेहमुच्चरते 'he strays away from home;' गुरुवचनमुच्चरते 'he transgresses the commands of his preceptor.'
Why do we say \when used in the transitive\? Observe बाष्पमुच्चरति 'the vapour is rising.' Here it is parasmaipadi.,