stuttered

"The speakeasy was a popular place for students to meet after school. "

"He turned when he heard the sound of footsteps behind him.  Nobody made a sound."

"My uncle ran in the city marathon last weekend. "

"The car's exhaust was making a loud rumbling noise. "

"My thanks to my teacher are sincere for helping me understand the lesson. "

"The difficulty of the math problem made it hard for many students to solve it. "

"The doctor prescribed a spasmodic to help control the painful muscle spasms in Sarah's neck. "

"He stuttered a few words of thanks."

"The teacher wrote new vocabulary words on the board. "

"The ancient Romans used a powerful siege engine to break down the city walls. "

"The teacher used repetition of vocabulary words to help the students learn them. "

"The singer's powerful vocal was captivating the audience. "