Clitic is the class of units which members exhibit syntactic characteristics of a lexical unit, but show evidence of being morphologically bound to another lexical unit, the host, by being unstressed or subject to word-level phonological rules [Crystal 1980: 64; Hartmann and Stork 1972: 38; Anderson 1985: 158; Klavans 1982: xi-xiv, 74-76, 83, 93-95, 100-101; Zwicky 1977: 5].