to  be  all  Greek to  somebody
<abbr style="text-decoration: underline;" title="be / sound" > be</abbr>
saʊnd
sawnd
<abbr style="text-decoration: underline;" title="all / like" > all</abbr>
laɪk
laik
Greek
gri:k
grik
to
somebody
sʌmbədi
sambēdi

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
慣用句
くだけた
The instructions sounded like Greek to me. 
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