not experienced in a particular job or activity► inexperienced someone who is inexperienced does not know much about a job or activity, either because they have not done it at all or because they have done it for only a short time: · Inexperienced managers often have problems with their staff.· There are a lot of young, inexperienced players on the team.
► lack experience to not have enough experience of doing a particular job or activity: · I know Sally lacks experience, but she's tremendously enthusiastic.lack experience of British: · If Glover lacks experience of management, why was he put in charge?lack experience doing something American: · He clearly lacked experience speaking before large groups.
► be new to something if you are new to a job or activity, you do not have much experience of doing it because you have only just started it: · As you are new to the job, we don't expect you to work as fast as the others.be new to the game (=to have no experience of an activity or a business): · They're new to the software game, so they're spending a lot on advertising.
► untrained someone who is untrained is doing a job or activity that they have not yet been officially taught to do: · Untrained nurses are not allowed to treat patients who are seriously ill.untrained in: · The records are confusing to anyone untrained in accounting.
► rookie American someone who is still new and inexperienced in an activity or job, especially in a sport, the army, or the police: · Don't be too hard on the guy, he's just a rookie.rookie pitcher/quarterback/agent/coach etc: · Mariucci is the first rookie coach in NFL history to win 11 games in a row.
► novice someone who has just started doing a particular job or activity and has very little or no experience: · The Eiger is a difficult mountain to climb. Novices should not attempt it.novice to: · If you're a novice to working with computer graphics, you should buy this CD-ROM.novice skier/user/driver etc: · Novice drivers are responsible for a large portion of all accidents.
► the uninitiated people who have no experience or knowledge of a difficult subject or skill - used in formal or humorous situations: to/for the uninitiated: · To the uninitiated, most computer systems seem complex and difficult to understand.· The classes are designed for the uninitiated, starting with the basics of car mechanics.
the uninitiated [plural] people who do not have special knowledge or experience of something: 
To the uninitiated, this will make little sense.—uninitiated adjective