sadly, notoriously, infamously
La petite sirène gémit et regarda tristement sa queue de poisson.
The little mermaid moaned and looked sadly at her fishtail.
Il fut arrêté et exilé aux Andamans, îles tristement célèbres.
He was arrested and exiled to the Andamans, islands of ill repute.
— Gangs of Wasseypur : 1ère partie (2012)
She looked at me sadly.