esoteric /ˌɛsəˈterɪk/ adjective Learner's definition of ESOTERIC
[more esoteric; most esoteric]
1
: only taught to or understood by members of a special group秘传的；仅内传的；只有内部（或内行）人知晓的 : hard to understand难懂的 2
: limited to a small number of people限于少数人的；限于小圈子的 — esoterically
/ˌɛsəˈterɪkli/ adverb