An Etymological Dictionary of Astronomy and Astrophysics

1. The first step or action of a matter; commencing move.
   

   2. An introductory act or step; leading action.

Etymology (EN): From Fr. initiative, from L. initiatus, p.p. of initiare “to begin,” from initium “a beginning,” → initial.

Etymology (PE): Bongâm, from bon “basis; root; foundation; bottom,” → fundamental, + gâm “step, pace,” → egress.