underhanded

Definitions

Marked by secrecy, dishonesty, or deception.

Executed with the hand below the level of the shoulder.

Examples

He used underhanded tactics to win the election by spreading false rumors about his opponent.

It was an underhanded move to steal credit for a project that his colleague had worked on for months.

Synonyms

deceitful sneaky dishonest surreptitious crafty sly furtive

Antonyms

honest transparent forthright candid aboveboard open sincere