syncretistic

adjective2

1. •
   Relating to the merging of two ideals, organizations or languages into one.

   • One has only to look at the syllabus of every fascist movement to find the major traditionalist thinkers. The Nazi gnosis was nourished by traditionalist, syncretistic, occult elements. — 1995
2. •
   Relating to a historical tendency for a language (such as English) to reduce its use of inflection.