If you describe someone's feelings or characteristics as undiluted, you are emphasizing that they are very strong and not mixed with any other feeling or quality.
例句
I will look back at this one with undiluted pleasure...回顧此事，我會無比地開心。The report had not been received with undiluted enthusiasm...這份報告并未收到熱烈的反響。
ADJ
（液體）未稀釋的
A liquid that is undiluted has not been made weak by mixing it with water.