In the conceptualization of the three long vowels above, uniskript glyphs employ the following visual-featural indexicality and sound-shape congruency correspondences:
- The extra length of the vowel is reflected visually through the juxtaposition of two glyphs.
- The number of lines represents the degree of opening of the mouth at the articulation of the beginning vowel.
- The circle on the right side represents the rounding of the lips at the end of the articulation of the long vowels.
- The curve in the right side of the first glyph represents the backness of the vowels since back vowels are perceived cross-sensory as rounded.
The same process is used to represent the English long vowels that end with a palatalization, as can be observed in Figure \ref{686588}.