anaptyxis

noun, plural an·ap·tyx·es [an-uh p-tik-seez, an-ap-] /ˌæn əpˈtɪk siz, ˌæn æp-/.

1. epenthesis of a vowel.

noun plural -tyxes (-ˈtɪksiːz)

1. the insertion of a short vowel between consonants in order to make a word more easily pronounceable