backstabbing

"My colleague from the accounting department helped me understand the new software. "

"The used car salesman was deceitful; he lied about the car's history to get a higher price. "

"The icy road was treacherous, causing many cars to slide. "

"The bully stabbed the other boy with a pen, causing a small, but painful, wound. "

"My sister is very helpful, especially when it comes to organizing things. "

"Your underhand should be entirely under the quilt."

"He spread his newspaper on the table."

"The United States is in an awkward situation with debt default looming."

"Dumbstruck with joy, she was unable to express herself verbally, but the gratitude in her face was evident to all."

"After many years of hard work, Maria received a promotion to senior manager. "

"The complicated instructions on the new software difficult me from completing the project on time. "

"The carnival games were unfairly difficult, and hardly anybody won a prize."