What is the function of a combining vowel?

• A. Connects word parts for easier pronunciation
• B. Indicates negation
• C. Determines the suffix
• D. Indicates number

Answer: (A)

A combining vowel is a bridge that links word parts so medical terms are easy to pronounce. The most common one is 'o,' and it connects a root to a suffix or to another root, smoothing pronunciation when consonants would clash. For instance, gastr/o/logy joins the root gastr- with the suffix -logy, using the vowel to connect the parts. It does not convey negation, it does not determine which suffix will be used, and it does not indicate number. Note that sometimes the vowel is omitted if the suffix begins with a vowel, but the job of a combining vowel is connection and ease of pronunciation.