Hiatus (linguistics)


Some languages do not have diphthongs, except optionally in rapid speech, or have a limited number of diphthongs but also numerous vowel sequences which cannot form diphthongs and thus appear in hiatus. This is the case of Japanese, Bantu languages such as Swahili, and Polynesian languages such as Hawaiian and Māori. Examples are Japanese aoi (あおい) 'blue/green', Swahili eua 'to purify', and Hawaiian aea 'to rise up', all of which are three syllables.


Many languages disallow or restrict hiatus, avoiding it either by deleting or assimilating the vowel, or by adding an extra consonant.


A glottal stop or a glide may be added between vowels (epenthesis) to prevent hiatus.

Some non-rhotic dialects of English insert /r/ to avoid hiatus after non-high word-final (or occasionally morpheme-final) vowels, although prescriptive guides for Received Pronunciation discourage this.[4]


In Greek and Latin poetry, hiatus is generally avoided, although it does occur in many authors under certain rules with varying degrees of poetic licence. Hiatus may be avoided by elision of a final vowel, occasionally prodelision (elision of initial vowel) and synizesis (pronunciation of two vowels as one without change in writing).


In Sanskrit, most instances of hiatus are created by the process of sandhi, as in arjuna'uvAca from arjunas or sarva'eva from sarve.



In Dutch and French, the second of two vowels in hiatus is marked with a diaeresis (or tréma). This usage is occasionally seen in English (examples include coöperate, daïs and reëlect), but it has never been common and over the last century its use in such words has been dropped or replaced by the use of a hyphen except in a very few publications, notably The New Yorker.[5][6] It is, however, still common in loanwords such as naïve and Noël and in the proper names Zoë and Chloë.

Other ways

In Scottish Gaelic, hiatus is written using a number of digraphs: bh, dh, gh, mh, th. Some examples include:

  • abhainn [ˈa.ɪɲ] "river"
  • adha [ˈɤ.ə] "liver"
  • ogha [ˈo.ə] "nephew"
  • cumha [ˈkʰũ.ə] "condition"
  • latha [ˈl̪ˠa.ə] "day"

This convention goes back to the Old Irish scribal tradition (although it is more consistently applied in Scottish Gaelic), e.g. lathe (> latha). However, hiatus in Old Irish was usually simply implied in certain vowel digraphs, e.g. óe (> adha), ua (> ogha).


Correption is the shortening of a long vowel before a short vowel in hiatus.

See also


  1. hiātus. Charlton T. Lewis and Charles Short. A Latin Dictionary on Perseus Project.
  2. "diaeresis". Oxford English Dictionary (3rd ed.). Oxford University Press. September 2005. (Subscription or UK public library membership required.)
  3. διαίρεσις. Liddell, Henry George; Scott, Robert; A Greek–English Lexicon at the Perseus Project
  4. "Voice and Speech in the Theatre"
  5. diaeresis: December 9, 1998. The Mavens' Word of the Day. Random House.
  6. Umlauts in English?. General Questions. Straight Dope Message Board.
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