Canadian raising affects these sounds before voiceless obstruents.
Marshallese has 24 of these sounds because back and round became secondary articulations on adjacent sounds, leaving a vertical system of height and ATR. On a spectrogram, these sounds show a gradual slope in F1 or F2. Breaking produces these sounds. Chomsky and Halle postulate in SPE that these underlyingly tense sounds are transformed synchronically by 3-way shift and glide insertion rules. Canadian raising affects these sounds before voiceless obstruents. Like geminates, these sounds take two timing slots; unlike (*) hiatus, which requires two syllables, they have a branching nucleus. Non-rhotic British dialects have centering ones. These sounds are drawn as arrows on a trapezoid diagram. General American has five rising, closing ones; four of those developed from Middle English long vowels in the Great Vowel Shift. For 10 points, give the term for a complex vowel in one syllable that transitions between two vowels.
Marshallese has 24 of these sounds because back and round became secondary articulations on adjacent sounds, leaving a vertical system of height and ATR.
diphthongs [prompt on vowels or long vowels until "hiatus" is read]