the speech defect of being unable to produce easily certain sounds: 'You m-m-must m-m-meet m-m-my m-m-mother' is an example of a stammer; That child has a bad stammer.
az: kəkələmə, dili pəltək vurma
ru: заикание
♦ verb
to speak with a stammer or in a similar way because of eg fright, nervousness etc: He stammered an apology.
az: kəkələmək
ru: заикаться