What does the prefix in the term morphology (morpho) refer to?

The prefix "morpho" in the term morphology specifically refers to "form" or "structure." In the context of morphology, which is the study of the structure and form of words in a language, this prefix highlights the focus on the physical characteristics and structural composition of language elements. By analyzing morphology, one can understand how different forms of words are constructed and how they relate to one another within a language.

In contrast, the other options do not capture this meaning. For instance, the prefix for sound does not apply here as morphology does not concentrate on phonetics. Similarly, while "study" relates to the overall discipline of morphology, it does not define the prefix itself. "Meaning" is more closely associated with semantics rather than the structural aspects intrinsic to morphology. Thus, understanding "morpho" as relating to form is central to grasping the concept of morphology effectively.