いさFreq.FrequencyTop 50,000Meanings1interjectionI don't know; who knowsarchaicArchaic interjection expressing uncertainty or ignorance. Not used in modern Japanese outside of historical or literary contexts.「いさ、そのことは存ぞんじませぬ」と老ろう人じんは答こたえた。"I don't know about that," the old man replied.
