clit·ic 
(klĭtĭk)
(klĭtĭk)n.
An unstressed word, typically a function word, that is incapable of standing on its own and attaches in pronunciation to a stressed word, with which it forms a single accentual unit. Examples of clitics are the pronoun 'em in I see 'em and the definite article in French l'arme, "the arm."
adj.
Of or relating to a clitic or clisis.
[Greek klitikos, leaning, from klīnein, to lean; see klei- in the Appendix of Indo-European roots.]
cliti·cize (-sĭz′) v.
clit′i·ci·zation (-sĭ-zāshən) n.