abrupt

"The connection between the two classrooms was established by installing a new phone line. "

"My grandfather uses a wheelchair to get around the house and to visit the park. "

"He raised his hand to make his announcement and said "Excuse me everyone, I have an announcement to make."

"A maverick politician repeatedly interrupted the debate by shouting."

"to terminate a surface by a line"

"a precipitous cliff"

"The student was unceremonious in his departure from class, slamming the door behind him without a word. "

"The teacher's presentation was incredibly engaging; everyone listened intently. "

"The two wires were unconnected, so the lamp wouldn't turn on. "

"The transitions between classes in high school can be difficult at first, but students quickly adapt. "

"The hours of his illness were disjointed and confusing as he drifted in and out of consciousness."

"The presentation about the new school rules was very clear and easy to understand. "