| Term | Definition |
| ameliorate | become better; make better |
| amelioration | an improvement |
| conserve | keep from waste, loss, or decay; save |
| conservation | preservation from loss, injury, or waste |
| conservationist | one who advocates the preservation of natural resources |
| detriment | injury, damage, or something that causes it |
| detrimental | harmful; damaging |
| exotic | introduced from another country; foreign |
| folly | foolish action or undertaking |
| formerly | in an earlier period; previously |
| former | preceding; previous |
| harmony | peacable or friendly relations; accord; tranquility |
| harmonious | friendly; amicable |
| ignore | refuse to take notice of; disregard |
| ignoramous | ignorant, stupid person; dunce; nincompoop |
| impediment | something that hinders or obstructs; hindrance; obstacle |
| impede | interfere or slow the progress of; hinder |
| indolent | disposed to avoid exertion; lazy |
| indolence | idleness; laziness |
| intact | untouched by anything that damages or diminishes; uninjured |
| invalid | not binding in law; having no force or effect; void |
| invalidate | abolish; annul |
| invalid | sickly or disabled person |
| noncarcinogenic | not producing, or tending to produce, cancer |
| parsimonious | unduly sparing in the spending of money; stingly; miserly |
| parsimony | stinginess |
| raze | dstroy by tearing down; demolish |
| reticent | inclined to be silent or secretive; uncommunicative |
| reticence | restraint in communicating |
| retire | withdraw from active duty or business; go to bed |
| retort | answer; reply sharply or angrily |
| subvert | overturn or overthrow from the foundation; undermine |
| subversion | sabotage; undermining |
| tractable | easily led, taught, or controlled; yielding; docile |
| tractability | obedience |