| Term | Definition |
| owl | a meat-eating bird with a flat face, large front-facing eyes, a hooked beak, and sharp claws, usu. active at night |
| habitat | the area in which an animal or plant normally lives |
| frustrate | to prevent s.o. from doing s.t., thwart: Their attempts to climb the mountain were frustrated by winter storms |
| threaten | to utter intentions of injury or punishment against:"He threatened me when I tried to call the police" |
| endanger | to place in danger, (syn.) to jeopardize: They went boating on the ocean in stormy weather and endangered their lives. |
| ineffective | not good enough to make s.t. happen, (syn.) fruitless |
| boisterous | noisy and playful |
| automation | the use of machines, esp. computers, to do the work once done by people |
| invasion | an attack, entrance by force |
| acre | a square piece of land measuring 69.57 yards (63.57 m.) on each side: The farmer owns 150 acres of land. |
| vest | sleeveless garment worn on the upper body |
| draft | the act of moving a load by drawing or pulling |
| furious | very angry |
| ecosystem | an ecological unit in nature |
| motivate | to give a reason to do s.t |