backstabber

she realized he was a backstabber when he betrayed her trust.

it's hard to work in a team with a backstabber around.

he was labeled a backstabber after revealing confidential information.

trust is essential, especially when dealing with a backstabber.

she couldn't believe her friend turned out to be a backstabber.

his reputation suffered because he was known as a backstabber.

a backstabber can ruin the morale of the entire group.

she had to confront the backstabber in her office.

being labeled a backstabber can affect one's career.

it's best to avoid backstabbers in the workplace.