DIPHTHONG AND TRIPHTHONG

           DIPHTHONG: a vowel sound, occuping a single syllable during the articulation of which a vowel sound, occupying a single syllable, during the articulation of which the tongue moves from one position to another, causing a continual change in vowel quality, as in the pronunciation of a in english late, during which the tongue  moves  from the position of (e) towards (I).

PROPER DIPHTHONG: A coalition or union of two vowel sounds pronounced in one syllable; as, ou in out, oi in noise; -- called a {proper diphthong}.

IMPROPER DIPHTHONG: A vowel digraph; a union of two vowels in the same syllable, only one of them being sounded; as, ai in rain, eo in people; -- called an {improper diphthong}.

TRIPHTHONGS: A compound vowel sound resulting from the succession of three simple ones and functioning as a unit, a composite vowel sound during the articulation of which the vocal organs move from one position through a second, ending in a third.

                  DIPHTHONG:

Toy

Boy

Buy

Cut

Tide

Tight

High

Hide

Cow

How

PROPER DIPHTHONG:

Tie

Noun

Out

Noise

Doubts

Die

South

Mouth

Count

Join

IMPROPER DIPHTHONG:

Rain

People

Drain

Brain

Train

Fail

Fear

Fair

Jail

Lair

TRIPHTHONG:

Fire

Employed

Explanation

Explain

Interview

Foreigner

Fundraiser

Feather

Expensive

Plumber

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