whirring

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

"The bee was buzzing around the flower. "

"Please put your cellphones on vibrate for the duration of the meeting."

"The children were excited to go to their classroom in the morning. "

"The constant noise from the construction site made it hard to concentrate on my homework. "

"The small toy airplane had two propellers that spun quickly, lifting it into the air. "

"The contractor will ceiling the new classroom walls with plaster before painting. "

"The military is accused of droning civilians in the remote village. "

"My brother is an engineer; he designs and builds bridges. "

"We had to sit in the dark because the electric was cut off."

"The construction crew's working on the new school building is going smoothly. "

"The teacher explained that "s" and "sh" are examples of a sibilant in English. "