| A | B |
|---|
| accumulate | increase in number or amount |
| aggravate | to make worse; to anger or annoy |
| conserve | to save by using carefully |
| contaminate | to harm by contact with something bad |
| diminish | to make or become smaller |
| drastic | severe; extreme |
| extravagant | spending, costing or using more than is required |
| frugal | careful in spending or using something |
| impurity | something that is harmful or dirty |
| peril | danger; something that is dangerous |
| perpetual | lasting or seeming to last forever or for a long time |
| resource | a supply that can be used when there is a need |
| substitute | to replace one thing or person with another |
| sustain | to keep up; support |
| vital | necessary for continued life or properity |
