obscure

"The dog cautiously approached the sleeping cat. "

"The teacher's lecture made many references to events in history. "

"My teacher explained the new math concept, and I understood it perfectly. "

"The breathtaking view from the mountaintop made the difficult hike worthwhile. "

"The photo of the distant mountain range was indistinct, making it hard to see the peaks clearly. "

"The historical romance novel was a bestseller in the bookstore. "

"The etymological root of the word "telephone" comes from Greek words meaning "far" and "sound." "

"The inscription of the new student's name onto the school roster was a simple but important task. "

"The teacher's instructions were intelligible, and the students easily followed along. "

"The new student sat in the back of the classroom, intentionally inconspicuous. "

"The university has an illustrious history, producing many Nobel Prize winners. "

"The impossible of finishing the project by Friday became a reality when everyone worked late. "