ólogo

"ólogo" is a common suffix in the Spanish language, derived from the Greek word "logos," meaning speech, word, or reason. It is primarily used to denote a person who studies or is an expert in a particular field or discipline. This suffix is attached to the root word that describes the subject of study, forming a noun that refers to the professional or scholar in that area.

Examples of its usage include "biólogo" (biologist), a person who studies biology; "geólogo" (geologist), an expert in geology; and "filósofo" (philosopher), someone who engages in the study of fundamental questions about existence, knowledge, values, reason, mind, and language. The suffix "ólogo" implies a deep understanding and often academic training in the specific domain. It is a productive suffix, meaning new terms can be coined by combining it with existing or newly created root words, although established terms are most common. The gender of the noun can be changed by replacing "o" with "a," for instance, "bióloga" for a female biologist.