| A | B |
|---|
| drastic | Severe; extreme |
| frugal | Careful in spending or using something |
| impurity | Something that is harmful or dirty |
| perpetual | Lasting or seeming to last forever or for a long time; continuous |
| resourceful | Able to deal with difficult problems |
| sustain | To keep up; to support |
| substitute | Something or someone that replaces another |
| resource | A supply that can be used when there is a need |
