initiate

nouns

someone new to a field or activity
someone who has been admitted to membership in a scholarly field
people who have been introduced to the mysteries of some field or activity
"it is very familiar to the initiate"
antonym

verbs

bring into being
"He initiated a new program"; "Start a foundation"
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take the lead or initiative in; participate in the development of
"This South African surgeon pioneered heart transplants"
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accept people into an exclusive society or group, usually with some rite
"African men are initiated when they reach puberty"
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bring up a topic for discussion
set in motion, start an event or prepare the way for
"Hitler's attack on Poland led up to World War II"
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