My/o is an example of: the prefix at the beginning of some words. the foundation of the word that provides its meaning. the vowel that joins a root to another root or to a suffix. the combination of a root and a combining vowel. the ending of some words.

the vowel that joins a root to another root or to a suffix

Explanation:

My/o as in Myology employs a combining vowel, in this case, the 'o', which serves as a merger for two root words or a root word and a suffix. Known to have no distinct meaning, this vowel eases the pronunciation of certain medical terms that are otherwise difficult to pronounce.

Another example is cardiology, which is the study of the heart and diseases associated with it. Cardia is a root word in Greek which means 'heart', and logy is another root wordy in Greek which refers to the 'study of'. It is widely used for this purpose and is seconded by the combining vowel 'a'.