The Torah portion to be read this Shabbat by Jews around the world depicts the great leader Moses… who was also hard of speaking.
The Hebrew word for a mute is אִלֵּם listen and repeat when referring to a male, and אִלֶּמֶת listen and repeat when referring to a female.
אָמְנָם הָיָה קָשֶׁה לוֹ לְדַבֵּר, אָבָל מֹשֶׁה לֹא הָיָה אִלֵּם.
Although it was difficult for him to speak, Moses was not mute.
Some other disabilities:
עִוֵּר, עִוֶּרֶת – blind person listen and repeat
חֵרֵשׁ, חֵרֶשֶׁת – deaf person listen and repeat
נָכֶה, נָכָה – disabled person (generic term) listen and repeat