disavowal

d+is+a+vowal - ‘D’ is a vowel. Think of a most stupid teacher teaching students of KG. one day he taught the students that D is a vowel. next day topper of the class complained. Then the teacher straight forwardly deny this. He told, he never said

dis + avow + al Dis- denial Avow - to declare openly, bluntly, and without shame

dis + a + vow >>> denying that u have not taken any such vow..