inscrutably

adverb
1
in a way that is impossible to understand or interpret, for example because somebody does not show any emotion so you don't know what they are thinking or feeling
به شکلی غیرقابل فهم, به‌طور معماگونه, به صورتی اسرارآمیز, به نحوی که درک‌ناپذیر باشد