后缀-ist

作形容词时表示“表示...主义的”，指人的名词后缀ist时，意为"person who"。
一.名词后缀

1)表示某种主义者或某种信仰者
1.naturalist
n.person who makes a special study of animals or plants 博物学家；自然主义者 *nat (=born)
例句：Naturalist Eul Gibbons introduced a generation of Americans to the delights of nature and eating naturally.自然主义者尤尔.吉本斯向美国的一代人介绍了自然以及自然饮食乐趣。
2.optimist
n.person who is always hopeful and looks upon the bright side of things,who believes that all things happen for the best 乐观主义者；乐天派 *optim(=best)
例句：President Ronald Reagan was an etemal optimist whose cheery outlook,eloquently presented,were enough to get him elected twice.罗纳德.里根总统是一个永远乐观主义者，他雄辩地陈述了自己的美好展望，这足以

使他成功连任。
3.evangelist
n.preacher of the Gospel,especially ,one who travels and holds religious meetings wherever he goes,preaching to any who are willing to listen.福音传播者，巡回福音传道者 *ev<eu(=good),angel(=messenger)
例句：His father was an evangelist who took his family whith him as he preached from coast to coast.他的父亲是一名福音传播者，带着一家人四处布道。
4.pacifist
n.person who believes that war should and could be abolished 和平主义者 *pac(=peace)
例句：Suddenly,citizens who had been pacifist all their lives were calling for war.一直都是和平主义者的市民突然要求发动战争。
5.pessimist
n.person who believes that the worst is most likely to happen.厌世主义者，悲观论者 *pessim(=worst)
例句：Don't listen to the pessimist who thinks this nation's glory is past.不要听信那个悲观主义者的话，他认为这个国家不再辉煌。
6.racist
n.racialist,believer in racialism or racism种族主义者
例句：Jackson has been receiving racist threats on his telephone answering machine.杰克逊的电话答录机不断地收到了种族主义的威胁。

2)表示从事某种职业的人，从事某种研究的人，与某事物有关的人
1.geologist
n.student of the earth's surface,physical features,divisions,climate,products,population,etc.地质学家 *geo(=earth)
例句：Foster,a renowned geologist wrote his first book on the Roman art in 1978.著名地质学家福斯特在1978年创作了他的第一本关于罗马艺术的书。
2.optometrist
n.specialist on optometry 验光师 *op(=eye,sight),metr(=measure)
She's an optometrist at an eyeglass shop in the mall.她是购物中心一家眼镜店的验光师。

二.形容词后缀
表示...主义的
1.communist 共产主义的;materialist 唯物主义的；socialist 社会主义的；nationalist 民族主义的;Marxist 马克思主义的；capitalist 资本主义的