be honour-bound

be/feel honour-bound to do something

(British & Australian) also be/feel honor-bound to do something (American & Australian)

to feel that you must do something because it is morally right, even if you do not want to do it I'd rather go to Andrew's party but I feel honour-bound to go to Caroline's because she asked me first.

Common Names:

Name	Pronounced	Usage
Fiachna	-	Irish
Blake	BLAYK	English
Arrington	['æriŋtən]
Sofia	zo-FEE-ah (German), so-FEE-ah (Italian), soo-FEE-ə (Portuguese), SO-fee-ah (Finnish)	Norwegian, Swedish, German, Italian, Portuguese, Catalan, Greek, Finnish, Estonian, Slovak, Romanian
Aude	OD	French
Lenox	LEN-əks	Scottish, English (Rare)