transient

"He measured his success relatively, that is, competitively."

"The ice cream was disappearing quickly because everyone loved it. "

"The sudden increase in student absences is a noticeable phenomenon. "

"The probability of passing the math test is high if you study regularly. "

"The number of mosquitoes increased exponentially after the heavy rain. "

"My sister is very helpful, especially when it comes to organizing things. "

"His nervousness about the upcoming presentation was evident in his shaky voice. "

"The intermediate level of Spanish class is a good fit for students who already know some basic vocabulary. "

"The teacher patiently explained the math problem, and the students were able to understand the steps involved. "

"The electricity bill was unusually high this month, likely due to the many electronics running in the house. "

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

"The cat was sleeping on the couch, but when I came back, it had disappeared. "