无从 (wú cóng): Have no way to (Adverb) — Meaning & Stroke Order

I don't have a book, so I have no way to study.

If we don't even have the basic data, how and from where can we possibly begin the analysis?

He refuses to talk about past mistakes, leaving us with no way to understand the truth of the matter.

Due to lack of evidence, the police have no way to investigate this case.

Due to contradictory information sources and a broken chain of evidence, the investigation has fallen into a predicament where it cannot proceed.