initiate

Etymology

Borrowed from Latin initiātus, perfect passive participle of initiō (“begin, originate”), from initium (“a beginning”), from ineō (“go in, enter upon, begin”), from in + eō (“go”).

noun

1. A new member of an organization.
2. One who has been through a ceremony of initiation.
3. One who is oriented in and familiar with a topic or subject; especially, one who is an expert in it.

verb

1. (transitive) To begin; to start.
   1859-1860, Isaac Taylor, Ultimate Civilisation How are changes of this sort to be initiated?
2. To instruct in the rudiments or principles; to introduce.
   1653-1655, Henry More, An Antidote against Atheism Divine Providence would only initiate and enter mankind into the useful knowledge of her, leaving the rest to employ our industry.
3. To confer membership on; especially, to admit to a secret order with mysterious rites or ceremonies.
4. (intransitive) To do the first act; to perform the first rite; to take the initiative.

adj

1. (obsolete) Unpractised; untried; new.
2. (obsolete) Begun; commenced; introduced to, or instructed in, the rudiments; newly admitted.