inscrutably
🇺🇸
/ɪnˈskruːtəbli/
🇬🇧
/ɪnˈskruːtəbli/
in a way that is very mysterious or hard to understand
The old man looked at her inscrutably, leaving her unsure of his intentions.
老紳士は彼女を不明瞭に見つめ、彼女を彼の意図に対して不安にさせました。