1. adjective [usually ADJECTIVE noun]
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.
⇒ I will look back at this one with undiluted pleasure.
⇒ The report had not been received with undiluted enthusiasm.
⇒ Her Irish accent, after thirty-odd years in London, is undiluted.
A liquid that is undiluted has not been made weak by mixing it with water.
COBUILD Advanced English Dictionary. Copyright © HarperCollins Publishers