jin4 ji4 jau5 seon3言而有信

Jyutpingjin4 ji4 jau5 seon3
Yaleyìhn yìh yáuh seun

Definition

To speak and keep one's promise; to be as good as one's word.

Grammar color guide

Noun
Verb
Adjective
Adverb
Pronoun
Classifier
Particle
Connector