epenthesis: the insertion of a vowel or consonant into a word to make its pronunciation easier
articulation: the aspect of pronunciation that involves bringing articulatory organs together so as to shape the sounds of speech
diabetes insipidus: a rare form of diabetes resulting from a deficiency of vasopressin (the pituitary hormone that regulates the kidneys); characterized by the chronic excretion of large amounts of pale dilute urine which results in dehydration and extreme thirst