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...回顾此事，我会无比地开心。The report had not been received with undiluted enthusiasm...这份报告并未收到热烈的反响。
ADJ
（液体）未稀释的
A liquid that is undiluted has not been made weak by mixing it with water.