일정한 패턴이나 움직임 없이 불규칙하고 변덕스럽게.
In a manner that is not even or regular in pattern or movement; unpredictably.
예문:
"The cursor moved erratically across the screen, suggesting a hardware malfunction."
"The patient's heart was beating erratically, causing concern among the medical staff."
"He has been acting erratically lately, often changing his mind without explanation."