noun, formal - the process of familiarizing someone with a new place, situation, or system, or the ability to understand your position or direction
verb - to contain many faults, inconsistencies, or weaknesses; to be badly constructed or easy to disprove because of numerous gaps or errors
noun - the quality of accepting and dealing with situations as they really are, rather than how you would like them to be
noun - a method of learning a language (or experiencing a culture) by being completely surrounded by it, without using your native language