bì​jīng

must-pass

必经 (必經) bì​jīng
must-pass adverb
describing a road, path, or entrance that is the only way to reach a destination

This is the only way to the city center.

unavoidable adverb
describing a stage, process, or step that is a necessary and inevitable part of an experience

Setbacks are an inevitable stage of growth.

Frequency

Movie subtitles
1.31 per million appears in 1% of films
Written text
1.94 per million

Sources

Definitions
CC-CEDICT