instability

"the equatorial regions"

"an irreversible engine"

"Our family lives in town."

"My parents often travel abroad for work. "

"The effect of the hurricane was a devastated landscape."

"The product is undergoing a change in order to improve it."

"The lightning caused thunder."

"Quality of life is usually determined by health, education, and income."

"The family reached a state of equilibrium after a long, difficult discussion about chores. "

"The farmer unstable the horse from the stable before taking it to the field. "

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

"The country surrounding our small village is mostly farmland. "