A Question to the Degree of the Linguistic Sign Iconicity

The arbitrariness of linguistic signs advocated by Ferdinand de Saussure means that the relationship between the signifier and the signified is immotivated.The signifier does not refer to the physical sound,but the sound image left in the mind of man.Nor does the signified refer to the physical substances,but the notion standing for the substances.There exist no natural links or motivations between the sound image and the notion.As for a particular language,there exists a very low degree of iconicity in such sound signs as onomatopoeic words,but some motivations can be found among such writing signs as pictographic characters,compound words and derivatives.