Definition (知識)
Used to emphasize a complete lack of knowledge or understanding about something.
一无所知；一无所悍
"Have they decided what to do?" "I don't have the faintest idea."
「他們決定要做什麼了嗎？」「我完全不知道。」
When he asked me that question, I didn't have the faintest idea of the answer.
當他問我那個問題時，我完全不知道答案。
"What time will she arrive?" "I haven't the faintest idea."
「她什麼時候會到？」「我完全不知道。」