Origin: Latin suffix -ate
Initiate has 11 different meanings across 2 categories:
someone who has been admitted to membership in a scholarly field
"After years of research, she was finally initiated into the exclusive society of medieval historians."
people who have been introduced to the mysteries of some field or activity
"it is very familiar to the initiate"
A new member of an organization.
"The club initiated its newest recruit during the welcome ceremony."
In plain English: An initiate is someone who has just joined a group and learned its secrets for the first time.
"The initiate was given a special password to welcome him into the secret society."
To begin; to start.
"The manager will initiate the new project next Monday."
Unpractised; untried; new.
"The initiate felt nervous about his first solo performance on stage."
"There is no such thing because "initiate" is not used as an adjective in standard English; it functions only as a verb or noun, so providing one would be factually incorrect rather than helpful."
Initiate comes from the Latin word initiatus, which originally meant "one who has been brought into a secret society." The term entered English to describe someone starting an action or process, evolving from its roots meaning simply "a beginning" or "an entrance."