scary

"The old dog had a scraggly coat, full of loose, tangled fur. "

"Avery puts a sheet over her head, pretending to be a ghost to frighten Emily."

"The student answered all the questions uncannily quickly, making the teacher suspicious. "

"The sudden, loud noise outside the classroom caused a fright among the students. "

"He hides his magazines under the bed."

"The tadpole changed into a frog.   Stock prices are constantly changing."

"Go easy on him: he is but a child."

"The students are subject to strict rules about late arrivals. "

"It surprises me that I owe twice as much as I thought I did."

"Thunder is preceded by lightning."

"Please strike the last sentence."

"The lightning caused thunder."