IPA: /ˌʌnɪˈnɪʃiˌeɪtɪd/
KK: /ʌnɪnɪʃiˌeɪtɪd/
Someone who lacks knowledge or experience in a particular area or subject.
The uninitiated may find the complex rules of the game confusing.
Uninitiated → It is formed from "un-" (meaning not) and "initiated" (from Latin "initiare", meaning to begin or to introduce). The word describes someone who has not been introduced or initiated into a particular knowledge or experience.
Think of someone who is 'not' ('un-') 'introduced' ('initiated') to something — that's why uninitiated means lacking experience or knowledge in a certain area.