The paper deals with the toponymy of Dicmo Donje collected primarily through field research. The historical overview of the Municipality of Dicmo is presented based on sources from scientific literature, especially on the conducted historical and archaeological research. The history of this location is of great importance for research because it reveals the languages and peoples who ruled this area. The continuity of the population is best read from the archeological remains of forts and cemetery finds, and then from the written material that testifies to the formation and organization of the settlement. Oral tradition and the folk etymology that comes with it are extremely important. With their help, the customs and culture of the place are learned, and accordingly the origin of numerous names. They can discover new directions in research and describe the process of toponymy, but they should be taken with caution because they can very easily lead the wrong way. Part of the paper is dedicated to the dialectological research of Dicmo speech, which belongs to the New Štokavian Western Ikavian dialect, because the researched toponymic characters originate within the local language, and the dialectological background serves as an additional basis for their study. A total of 210 toponyms were processed. Given the turbulent history, changes of government, relocations, national and cultural contacts and the karst nature of the soil, toponyms provide a whole range of names of different formations. The recording of toponyms contributes to the heritage of the explored area and encourages the preservation of toponyms as a treasure of the local language. Each name of this work is determined by the time and space of the place Dicmo, their relationship and permeation with language.