Secondary cardinal vowels If we reverse the lip position, i.e pronounce the first five wit ith the lips rounded and the rest wit ith the lips unrounded, we get another eight cardinal vowels. They are secondary cardinal vowelsSecondary Cardinal Vowels • If we reverse the lip position, i.e., pronounce the first five with the lips rounded and the rest with the lips unrounded, we get another eight cardinal vowels. They are secondary cardinal vowels