Languages I / English Vowels I: the Quadrilateral
Practice question · Match the pairs

Match each dimension of vowel description to what it specifies.

  • Height
  • Backness
  • Rounding
  • The quadrilateral
  • Height plotted against backness
  • Whether the lips are protruded
  • How close the tongue body is to the roof of the mouth
  • How far forward or back the tongue body sits
Hints
  1. Two dimensions concern the tongue and one the lips.
  2. The chart plots the two tongue dimensions against each other.
Show the answer
  • Height How close the tongue body is to the roof of the mouth
  • Backness How far forward or back the tongue body sits
  • Rounding Whether the lips are protruded
  • The quadrilateral Height plotted against backness
Why

Three dimensions and a two-dimensional chart, which is why rounding is shown by pairing symbols at the same point rather than by a third axis. Most languages use rounding predictably, English rounds its back vowels, so the compression rarely loses information.

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