Prepositive

1. (a.) Put before; prefixed; as, a prepositive particle.

2. (n.) A prepositive word.

Thesaurus Entries

antecedent, anterior, chief, exordial, first, foremost, headmost, inaugural, inductive, initiatory, introductory, leading, opening, precedent, preceding, precessional, precursory, prefixed, prelim, preliminary, preludial, prelusive, preparatory, prepositive, prevenient, prior, proemial, propaedeutic