The main concern of this research is to examine and compare two polysemous words, that is, boutin French and its Japanese equivalent hashi in the light of cognitive semantics. As a beginning, this paper critically reviews the general postulations in the two-level approach by referring to some works treating English polysemous prepositions. Then, the argument focuses on the analysis of polysemy by Taylor in support of “the usage-based model” of Langacker. Next, the investigation will be given to one of the French polysemous words, bout, from the viewpoint of cognitive semantics with questioning what a cognitive motivation is and where the “unification” which ties up the different senses of the word comes up. Finally, its Japanese equivalent hashi will be treated. Throughout this article, we devote ourself to proposing that language itself would not be a kind of “self-providing” device as has been proposed by dualists represented by generativists but always keeps connections with the external reality and stimuli with which we resonate by making use of the communal cognitive faculties endowed in our body.