undercutting

"My friend told me there was something in the box, but I didn't know what it was yet. "

"My brother is a strong competitor in our family's annual cooking contest. "

"The overhang in student enrollment at the school caused a shortage of classrooms. "

"The underneath of the aircraft was painted blue."

"Asphalt, composed of oil and sand, is a widely used material for roads."

"Every person who passes by is a potential customer."

"He spread his newspaper on the table."

"The family spread their picnic blanket on the grassy riverbank. "

"The sculptor carefully shaped the clay into a beautiful figure of a horse. "

"My sister's reputation for being organized helped her excel in school. "

"She suffered a terrible collapse after slipping on the wet floor."

"The secret passage undermined the foundation of the old house, making it unstable. "