esoteric
US /ˌes.əˈter.ɪk/
UK /ˌes.əˈter.ɪk/

形容詞
1.
難解な, 秘教的な, 専門的な
intended for or likely to be understood by only a small number of people with a specialized knowledge or interest.
例:
•
The book was full of esoteric references that only a few scholars could understand.
その本は、少数の学者しか理解できない難解な言及でいっぱいだった。
•
His lectures often contained esoteric jokes that went over most people's heads.
彼の講義には、ほとんどの人が理解できない難解なジョークがよく含まれていた。
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