contaminatevt. 染污（to soil, stain, corrupt, or infect by contact）
（类）hedge·loss=quarantine·contamination=safeguard·accident
两面下注以减小损失=检疫以防止污染=安全措施防止事故发生（防止关系）
（反）contaminate
◆ purify污染
◆ 净化
（同）defile, pollute, soil, taint
contemplatev.沉思（meditate on or ponder）
（例）the surgeon contemplated the difficult operation.
外科医生为这一棘手的手术苦思冥想。
contentadj. 满足的（manifesting satisfaction with one's possessions）
（类）disaffected·contentment=dubious·commitment/conviction
不满的·满足=可疑的·负责/确信
gripe·discontent=praise·admiration
抱怨·不满=赞美·钦佩 （动作及表示情感）
disaffected·contentment=anxious·serenity
不满意的·满意=担忧的·平静
（反）disaffected
◆ content不满
◆ 满足
restiveness
◆ contentment难以驾御
◆ 容易满足
contented
◆ avaricious满足
◆ 贪婪
（同）satisfied , pleased, contented, complacent
（记）比较：contend contentious contention attentive abstention contented tentative
contentiousadj.好辩的，喜争吵的（exhibiting an often perverse tendency to quarrels）
（类）meddlesome·pry=contentious·argue多管闲事的·探察=好争吵的·争吵
（反）contentious
◆ conciliatory喜争吵的
◆ 安抚的
contention
◆ agreement争论
◆ 同意
（记）con＋tent（拉）互相拉争论
（同）belligerent, bellicose, combative, gladiatorial, militant, truculent