| courtesy |
good, polite manners. |
| extra |
more than is expected or usual. |
| fact |
something known or proved to be true. |
| flash |
a sudden, bright light that shines and then disappears. |
| knock |
to hit a door in order to make noise. |
| leave1 |
to go away from a place. |
| medical |
having to do with the study or practice of medicine. |
| numb |
not able to feel; having no feeling. |
| relationship |
a connection between people. |
| skip |
to move forward by jumping on one foot and then on the other. |
| square |
a flat, closed figure with four straight sides of equal length and four equal corners. |
| syrup |
a thick, sweet liquid. |
| system |
a group of things or parts that work together as a whole. |
| telephone |
to call or speak to someone using an electronic device that sends and receives sound over long distances. |
| test |
an examination or experiment to find out what something is, what it is made up of, or how good it is. |