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