occlusion

"My friend told me there was something in the box, but I didn't know what it was yet. "

"The scientist carefully examined the substance to determine its chemical composition. "

"The fallen tree obstructs the road, making it impossible to drive through. "

"The birds had built an amazing structure out of sticks and various discarded items."

"The tall building was occluding the sun, making the street below dark. "

"The darkness of the room made it difficult to see."

"The alignment of the students' desks in the classroom made it easier for the teacher to circulate. "

"The tall tree occludes the view of the lake from our house. "

"What is the pronunciation of "hiccough"?"

"Even from a young age it was clear that she had the potential to become a great musician."

"The absorption of new information during the lecture was crucial for passing the exam. "

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