-desis

Borrowed from Ancient Greek δέσῐς (désĭs, “binding together”), from δέω (déō, “to bind, tie, fasten”) +‎ -σῐς (-sĭs, nominal suffix).

Terms derived from this suffix usually have two pronunciation alternatives, with a tendency that partially reflects the boundary of UK and Commonwealth English versus American English; the former tends toward /-ˈɒdɪsɪs/, and the latter also uses /-ˈɒdɪsɪs/ for some terms but usually uses /-oʊˈdiːsɪs/ for some others.

• IPA^(key): /-ˌdɪs.ɪs/, /-ˈdiːsɪs/
• Rhymes: -ɒdɪsɪs
• Rhymes: -iːsɪs

-desis

1. (medicine) Binding, fusion.

   arthrodesis, pleurodesis

• “-desis”, in Merriam-Webster Online Dictionary, Springfield, Mass.: Merriam-Webster, 1996–present.

• Deiss, sides