Long-term areal contacts of Yakut ancestors with Mongolic-speaking tribes are embodied in the lexical system of the language, ideophones in particular. The picture of the world is represented in ideophones emotionally and expressively, therefore they are used to describe an object more lively and in detail. Yakut and Mongolian are very similar in abundance of lexical-semantic diversity of ideophones which define the national specific characteristics of the compared languages. The paper considers structural-semantic features of Yakut and Mongolian figurative verbs of visual action characterizing motion mostly related to human and animal appearance. Their common and characteristic features are clarified. Yakut ideophones in contrast to Mongolian are characterized by more specified lexical-grammatical meanings. They feature polysemy and various aspect and voice forms that sometimes build word forms with a lexicalized meaning. In Mongolian, the analyzed verbs can also be represented by aspect indicators, the forms of a single and multiple actions.
Thus, these are aspect and voice forms that are the most productive derivational forms supplementing the body of ideophones.
The received results may be used as basis for further comparative-contrastive studies of Altaic languages as well as a supplementary illustrative material for the Mongolian-Russian-Yakut Dictionary being currently compiled.