Complex sentence: The "ology" ending is a combination of the letter "o" plus "logy" in which the letter o is used as an interconsonantal letter which, for phonological reasons, precedes the morpheme suffix logy.
Split into simpler sentences: The "ology" ending is a combination of the letter "o" plus "logy". The letter o is used as an interconsonantal letter which for phonological reasons, precedes the morpheme suffix logy.