honour an obligation BrE
honor an obligation AmE

However in a proper case the court is prepared to balance the public interest in full disclosure on discovery against the public interest in honouring an obligation of confidence.

And the films of Mr. Nakata and the Pangs have absorbed some of that mournful dignity; it's as if the filmmakers were discharging a solemn duty, honoring an obligation to the spirits they invoke.

But after weeks in which frictions over Bosnia have caused deep strains between the United States and its NATO allies, Administration officials said Mr. Clinton was bound to honor an obligation that had become moral as well as strategic.