This article reveals through a number of examples that the etymological dictionary of the Uzbek language serves as an information source when developing semantic extensions of lexical units of the Uzbek language. Also, during the historical development of the word language, not changing in content, in terms of sound, the phenomena of homonymy were subjected to analysis. If we consider the use of the"etymological dictionary of the Uzbek language" by the general public, it is noted that the reviews are explained in a popular way, in a compact way, which gives ease in the development of comments of a semantic extension. The language Corps or other information search tools are used by the general public. This explains the considerations regarding the need to simplify the semantic extension style.