(d) Infantile is of or occurring among babies or very young children (so should not be occurring among adults - disapproval); charlatan is a person falsely claiming to have a special knowledge or skill (false claim - disapproval), a fraud; imbecile is a stupid person (act of being stupid - disapproval); childlike is (of an adult) having good qualities associated with a child; awful is very bad or unpleasant (something being bad or unpleasant - disapproval).