complicity

"My brother flunked biology because he cheated on his mid-term."

"The complexity of the math problems made it difficult for many students to solve them. "

"The cashier was complicit in the theft by not ringing up items for his friend. "

"The student was caught wrongdoing on the test, so the teacher gave him a zero. "

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

"The pinpoint of light from the flashlight helped me find the lost button. "

"The experience affected me deeply."

"The student was arrested as an accomplice in the cheating scandal. "

"to suspect the presence of disease"

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

"The student's involvement in the school play was evident in her enthusiastic rehearsals. "

"the performance of an undertaking or a duty"