synaeresis

/sษชnหˆษ›ษนษ™sษชs/

IPA: /S IH1 N ER0 IY1 S IH0 S/

noun
  1. 1

    The contraction of two vowels into a diphthong or a long vowel.

  2. 2

    The separating out of the liquid from a gel.

Source: https://en.wiktionary.org/wiki/synaeresis