invisibly
🇺🇸
/ɪnˈvɪzəbli/
🇬🇧
/ɪnˈvɪzəbli/
so subtly or faintly that it cannot be seen
The magician made the coin disappear, moving his hand almost invisibly.
魔法使いはコインを消し、手をほとんど見えないように動かした。