dastardly in a sentence

Definition

Dastardly: characterized by treachery or wickedness, often involving deceitful or cowardly actions.

His dastardly plan to undermine her success was finally uncovered.
The villain's dastardly deeds left the town in chaos and despair.
With a dastardly grin, he revealed his intentions to betray his closest friends.
The dastardly act of sabotage shocked everyone who believed in his integrity.
She could hardly believe her ears when she heard his dastardly confession.