wú​cóng

lack access

无从 (無從) wú​cóng
lack access adverb
to be beyond one's authority, capability, or access to information

Since it is highly confidential, ordinary staff have no way of knowing the details.

no way expression
to have no way or means of doing something, or to not know where to begin

Faced with so many tangled clues, the police felt at a loss for where to start.

Frequency

Movie subtitles
2.83 per million appears in 1% of films
Written text
6.36 per million

Sources

Definitions
CC-CEDICT