Unworldly
Part of speech: adjective
Definition: Of or relating to the spiritual as opposed to the material. Unconcerned with secular matters. Lacking sophistication.
Naive
Part of speech: adjective
Definition: Lacking experience, wisdom, or judgement.Produced in a simple, childlike style, deliberately rejecting sophisticated techniques.
Example sentence: Politics is not a game for naive thinkers. You may go in as an idealist, but you certainly won't come out as one.