In Latin and Greek poetry, correption is the shortening of a long vowel at the end of one word before a short vowel at the beginning of the next. Vowels next to each other in neighboring words are in hiatus

Hiatus (linguistics)

In phonology, hiatus or diaeresis refers to two vowel sounds occurring in adjacent syllables, with no intervening consonant. When two adjacent vowel sounds occur in the same syllable, the result is instead described as a diphthong....

.

Homer

Homer

In the Western classical tradition Homer , is the author of the Iliad and the Odyssey, and is revered as the greatest ancient Greek epic poet. These epics lie at the beginning of the Western canon of literature, and have had an enormous influence on the history of literature.When he lived is...

 uses correption in dactylic hexameter

Dactylic hexameter

Dactylic hexameter is a form of meter in poetry or a rhythmic scheme. It is traditionally associated with the quantitative meter of classical epic poetry in both Greek and Latin, and was consequently considered to be the Grand Style of classical poetry...

:

• Ἄνδρα μοι ἔννεπε, Μοῦσα, πολύτροπον, ὃς μάλα πολλὰ
  πλάγχθη, ἐπεὶ Τροίης ἱερὸν πτολίεθρον ἔπερσε·
  —

• Tell me, O Muse, of the man of many devices, who wandered full
  many ways after he had sacked the sacred citadel of Troy.
  — translation by A.T. Murray

Here the sequence η ε in bold must be pronounced as ε ε to preserve the long—short—short syllable weight sequence of a dactyl

Dactyl (poetry)

A dactyl is a foot in meter in poetry. In quantitative verse, such as Greek or Latin, a dactyl is a long syllable followed by two short syllables, as determined by syllable weight...

. Thus, the scansion of the second line is thus:

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