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