When a suffix that begins with vowel is added the combining form rather than word root precedes suffix?

You are correct! When a suffix that begins with a vowel is added to a word root, a combining form (usually ending in a vowel) is used instead of the raw word root. This is done to ensure smooth pronunciation and avoid awkward consonant clusters.

Here's a breakdown:

* Word root: The basic form of a word, often a Greek or Latin term. Examples: "cardi" (heart), "derm" (skin), "gastr" (stomach).

* Combining form: A modified form of the word root, ending in a vowel, often "-o" or "-i". Examples: "cardio-", "dermat-", "gastro-".

* Suffix: A word part added to the end of a word, often changing its grammatical function or meaning. Examples: "-itis" (inflammation), "-ology" (study of), "-ectomy" (surgical removal).

Example:

* Word root: "cardi" (heart)

* Combining form: "cardio-"

* Suffix: "-itis" (inflammation)

Combined: "carditis" would be incorrect, as it creates an awkward pronunciation.

Instead, we use the combining form: "cardio-" + "-itis" = "carditis" (inflammation of the heart).

Why use combining forms?

* Pronunciation: Combining forms create smoother transitions between words, preventing awkward consonant clusters.

* Clarity: Combining forms clearly differentiate between similar-sounding words.

* Consistency: Combining forms provide a consistent and standardized approach to word building.

Therefore, whenever a suffix beginning with a vowel is added to a word root, using a combining form ensures proper pronunciation and readability of the final word.