fu6 geoi1 soeng1 ji1輔車相依辅车相依

Jyutpingfu6 geoi1 soeng1 ji1
Yalefuh gēui sēung yī

Definition

To rely on one another as cheek and jowl; to be as dependent on each other as the jawbone and the cheek.

writtenpeopleother

How it's used

Originating from ancient military strategy, this idiom describes a relationship where two parties are so closely linked that the survival of one depends entirely on the other. It is rarely used in casual daily chatter and carries a formal, literary weight. You will most often encounter it in political commentary, business analysis, or historical discussions.

Examples

The two companies are collaborating, they are truly interdependent.
Those two departments are interdependent, how can they be separated?

Common phrases

an interdependent relationship

Common mistake

Do not use this to describe casual friendships or simple cooperation, as it implies a deep, structural, and often existential level of mutual reliance.

Grammar color guide

Noun
Verb
Adjective
Adverb
Pronoun
Classifier
Particle
Connector