The Andamanese languages are agglutinative languages, with an extensive prefix and suffix system. They have a distinctive noun class system based largely on body parts, in which every noun and adjective may take a prefix according to which body part it is associated with (on the basis of shape, or functional association). Thus, for instance, the "aka-" at the beginning of the Great Andamanese languages' names is a prefix for objects related to the tongue. (See Great Andamanese languages for examples.) Terms for body parts are inalienably possessed, requiring a possessive adjective prefix to complete them, so one cannot say "head" alone, but only "my, or his, or your, etc. head".