undiluted
adjective uk/ˌʌn.daɪˈluː.tɪd/ us/ˌʌn.daɪˈluː.t̬ɪd/
未搀水的;未稀释的
If a liquid is undiluted it has not been mixed with water to make it less strong.
纯粹的;毫无掩饰的
If the truth or a fact, etc. is undiluted it is stated in a simple, clear way, without trying to disguise it or make it easier to accept.