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1.volatile a．易變的，多變的(characterized by or subject to rapid change)
詞根記憶：volat(飛)+ile--飛來飛去的--多變的
例：volatile demand多變的需求
同根詞：volant (a．飛行的；敏捷的)：volary(n．大型鳥舍)
2.volunteer n.志愿者(a person who voluntarily undertakes or expresses a willingness to undertake a service);a.自愿的(being, consisting of, or engaged in by volunteers)
詞根記憶：volunt(志愿)+eer(人)--志愿者
例：We should disband our volunteer service and hire a commercial ambulance service.
同根詞：benevolent(a．善心的，好意的)；volition(n．意志力)
3.voracious a．狼吞虎咽的(devouring or craving food in great quantities)；貪婪的(excessively eager; insatiable)
詞根記憶：vor(吃)+acious--吃得多的--狼吞虎咽的
例：The survival of a rare New Zealand species of mistletoe is threatened both because its leaves are extremely tasty to a voracious opossum species and because its flowers are pollinated by two species of birds whose populations are in decline.
派生詞：voraciously( ad.狼吞虎咽地；貪得無厭地)
4.vortices n．漩渦（vortex的復數）
例：Sunspots, vortices of gas associated with strong electromagnetic activity are visible.
5.vulnerable a．易受攻擊的(capable of being physically wounded; assailable)
詞根記憶：vulner(傷)+able--易受攻擊的
例：The argument is most vulnerable to the objection.
派生詞：vulnerably( ad.脆弱地；易受傷害地)；vulnerability(n.弱點；易損性)
6.wage v.發動（戰爭）(to engage in or carry on);n．工資(a payment, usually of money for labor or services, usually according to contract and on an hourly, daily, or piecework basis)
記：wage作為“工資”這一意思大家比較熟悉，可以理解為“為了工資而斗爭”
例：Agricultural revenues in excess of the amount needed for subsistence were used by medieval kings to wage war.
7.wanton a．無節制的，放縱的(being without check or limitation);頑皮的(mischievous)
發音記憶：“頑童”--頑皮的
例：Customs inspectors are often treated not like government employees but wanton poachers by travelers.
8.warbler n．（能叫出柔和顫音的）鳴禽
例：Blue-winged warblers are unlike most species of warbler in which it is very difficult to tell the male and female apart.
9.warrior n．戰士(a man engaged or experienced in warfare)
詞根記憶：war(戰爭)+rior--戰斗的人--戰士
例：terracotta warriors秦始皇兵馬俑
n. 渴望，熱望 動詞crave的現在分詞
