confounds

"In our study about exercise and weight loss, the confounds of diet and sleep made it hard to know if the exercise alone was really responsible for the results. "

"The complicated math problem really confounds me, and I can't figure out how to solve it. "

"The noisy classroom often confounds students, making it difficult for them to distinguish between important instructions and casual chatter. "

"The heavy rain confounds the already difficult traffic, making everyone late. "

"The loud music from the party next door confounds my ability to concentrate on my homework. "

"His actions confounded the skeptics."

"The unexpected snowstorm completely confounded our plans for a picnic in the park. "

"Confound the lady!"

"His gambling addiction confounds his family's financial stability. "

"The magician's incredible disappearing act confounds the audience. "