to be all Greek to somebody

英語での「 be all Greek to somebody 」の定義と意味

to be all greek to somebody
01

used for saying that one is unable to understand the meaning of something particular

to [be|sound] (all|like)  Greek to {sb} definition and meaning
IdiomIdiom
InformalInformal
example
I tried reading that advanced physics textbook, but it's Greek to me.
The technical jargon used by computer programmers is like Greek to most people.
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