What's the adjective for initiating? Here's the word you're looking for.
Included below are past participle and present participle forms for the
verbs initial, initialize, initiate, initialise and init which may be used as adjectives within certain contexts.
initial
Chronologically first, early; of or pertaining to the beginning, cause or origin.
Spatially first, placed at the beginning, in the first position; especially said of the first letter of a word.