Which of the following describes an incomplete word containing a root word, prefix or suffix?

The correct answer is combining forms because it specifically refers to parts of a word that can stand alone or be combined with other elements to create a complete word. Combining forms generally include a root word along with a prefix or suffix, illustrating the way in which different word parts can be integrated into the structure of a term. This is essential in veterinary medical terminology, where understanding the components of words can enhance comprehension and communication about complex concepts.

In contrast, a compound word consists of two or more complete words combined together, forming a new word but does not highlight the presence of prefixes or suffixes. A root word is simply the base part of a word that conveys its primary meaning but lacks any additional prefixes or suffixes. A complete word refers to a term that has all its necessary parts and conveys a clear meaning. Thus, the term combining forms most accurately captures the concept of an incomplete word structure that still holds meaning through its components.