soured

"After the field trip, only a few students remained in the classroom. "

"After working long hours with little recognition, Sarah disenchanted with her job and started looking for a new one. "

"The strong, burning smell was a warning sign that sulphuric acid might be present. "

"He listened carefully to his mother's concerns, feeling sorrowful about her disappointment. "

"She is bleaching her old jeans to give them a lighter, more fashionable look. "

"In biology class, we learned that technically, even fruits are vegetables because vegetables are any plant. "

"We prepared the spacecraft for takeoff."

"Juggling is an amusing pastime, but generally unproductive."

"Failing the test discouraged her from studying hard. "

"The politician received a lot of public criticism for his controversial stance on the issue."

"My teacher has a good relationship with all her students. "

"The complicated instructions on the new software difficult me from completing the project on time. "