inaudibly
🇺🇸
/ɪnˈɔːdəbli/
🇬🇧
/ɪnˈɔːdəbli/
so quietly that it cannot be heard
She whispered the secret to him, but he couldn't hear her because she was speaking inaudibly.
그녀는 그에게 비밀을 속삭였지만, 그녀가 들리지 않게 말하였기 때문에 그는 그녀를 듣지 못했다.