This paper analyzed the formation mechanism and semantic strictness of korean asyntactic compounds in the view of the distance iconicity. The principle of proximity is reflected in the formation of asyntactic compound that shows antonymous or significant relation within the word. The association strength between antonym is very high and the conceptual distance is close. The synonym can appear in the same location and direct the same object because of the close conceptual distance. Finally, the stems of antonym or synonym are combined to form asyntactic compounds according to the proximity principle. In addition, the asyntactic compounds have the meaning of ‘repeating motion’ that the other composition cannot express. According to the principle of directness, asyntactic compounds can show the abstract meanings or various meanings because the components are directly combined without the connective ending. The effect of components became stronger, resulting in more abstract meanings or various meanings. On the other hand, syntactic compounds show the distance between components because of the connective ending, therefore, the strength of the effect between the two stems decreases. The morphological strictness and semantic strictness of Korean asyntactic compound words are matched.