In linguistics, synaeresis (; also spelled syneresis) is a phonological process of sound change in which two adjacent vowels within a word are combined into a single syllable.
The opposite process, in which two adjacent vowels are pronounced separately, is known as "diaeresis".
For any given word, speakers generally hold a traditional view about the standard pronunciation of that word. When realized in a careful reading style, each particular word is associated with this single, standard phonetic form. However, each word also possesses multiple non-standard or reduced phonetic forms which are produced in a greater range of contexts. These multiple variations in the pronunciation of a single word are referred to as allophonic variants. To classify one of these other forms as an allophonic variant of a word means that pronouncing the word in this way will not change the intended meaning of the word.
Synaeresis is one of various phonological processes in which segments of words or phrases are lost. The general term for a loss of sound segments in the field of linguistics is known as "elision". Other types of elision include the processes of apheresis, syncope, apocope, synizesis, and synaloepha.
Certain words in Proto-Indo-European had two vowels separated by the consonant s or y ( esu "good"). In Greek, this consonant changed to h ( ehu), and was lost between vowels ( eu). In Homer, the two vowels were sometimes pronounced separately (diaeresis: ἐΰ) and sometimes together (synaeresis: εὖ). Later in Attic Greek, they were always pronounced together.
In Greek synaeresis, two vowels merge to form a long version of one of the two vowels (e.g. e + a → ā), a diphthong with a different main vowel (e.g. a + ei → āi), or a new vowel intermediate between the originals (e.g. a + o → ō). Contraction of e + o or o + e leads to ou, and e + e to ei, which are in this case spurious diphthongs.
In general, the accent after contraction copies the accent before contraction. Often this means circumflex accent. But for nouns, the accent follows the nominative singular. Sometimes this means a different accent from the uncontracted form — i.e., whenever the ending has a long vowel.
Contraction in Greek occurs throughout the present and imperfect of contracted verbs and in the future of other verbs. There are three categories based on the vowel of contraction: a, e, or o.
a-contract: "honor" { | |
τιμ ῶ | |
τιμ ᾷς | |
τιμᾷ | |
τιμ ῶμεν | |
τιμ ᾶτε | |
τιμ ῶσι |
φιλ ῶ |
φιλ εῖς |
φιλ εῖ |
φιλ οῦμεν |
φιλ εῖτε |
φιλ οῦσι |
ἀξι ῶ |
αξι οῖς |
ἀξι οῖ |
ἀξι οῦμεν |
ἀξι οῦτε |
ἀξι οῦσι |
singular { | |
ὀστ οῦν | |
ὀστ οῦ | |
ὀστ ῷ | |
ὀστ ᾶ |
ὀστ ῶν |
ὀστ οῖς |
S-stem nouns undergo contraction with vowel endings.
-os stem |
{ |
no contraction |
γένους |
γένει |
γένη |
γενῶν |
no contraction |
no contraction |
αἰδοῦς |
αἰδοῖ |
αἰδῶ |
Some compound nouns show contraction:
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