1. Word -- A word is a minimal free form of a language that has a given sound and meaning and syntactic function.

　　2. There is no logical relationship between sound and meaning as the symbolic connection between them is arbitrary and conventional. E.g. “woman” means ’Frau’ in German， ’Femme’ in French and ’Funv ’in Chinese. On the other hand， the same sound /rait/ can mean right， rite and write， though denoting different things， yet have the same sound.