instantaneous
🇺🇸
/ˌɪnstənˈteɪniəs/
🇬🇧
/ˌɪnstənˈteɪniəs/
happening right away, without any delay
The effect was instantaneous when the switch was flipped.
스위치가 눌렸을 때, 효과는 즉시 발생했다.