downfall

"The building of the bridge will be completed in a couple of weeks."

"The steep decline in the student population led to the school closing. "

"a precipitous cliff"

"The sun was finally appearing from behind the clouds. "

"The critical factor in getting a good grade on the history test was understanding the timelines. "

"The earthquake shook the school building during recess, causing some minor damage. "

"The economic situation in the city has affected many families' ability to afford groceries. "

"After careful consideration, the student made a decision about which college to attend. "

"The school's political represented the students' concerns to the principal. "

"She read my fortune. Apparently I will have a good love life this week, but I will have a bad week for money."

"to deteriorate the mind"

"The deterioration of the student's grades was a concern for his parents. "