enclitic

1650s (adj.), in grammar, "subjoined and accentually dependent," said of a word or particle which in regard to accent forms a part of a preceding word and is treated as if one with it; 1660s (n.), "a word accentually connected with a preceding word;" from Late Latin encliticus, from Greek enklitikos "throwing its accent back," literally "leaning on," from verbal adjectival stem of enklinein "to bend, lean on," from en "in" (see en- (2)) + klinein "to lean," from PIE root *klei- "to lean."