後綴-ist

作形容詞時表示“表示...主義的”，指人的名詞後綴ist時，意爲"person who"。
一.名詞後綴

1)表示某種主義者或某種信仰者
1.naturalist
n.person who makes a special study of animals or plants 博物學家；自然主義者 *nat (=born)
例句：Naturalist Eul Gibbons introduced a generation of Americans to the delights of nature and eating naturally.自然主義者尤爾.吉本斯曏美國的一代人介紹了自然以及自然飲食樂趣。
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 樂觀主義者；樂天派 *optim(=best)
例句：President Ronald Reagan was an etemal optimist whose cheery outlook,eloquently presented,were enough to get him elected twice.羅納德.裡根縂統是一個永遠樂觀主義者，他雄辯地陳述了自己的美好展望，這足以

使他成功連任。
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.福音傳播者，巡廻福音傳道者 *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.他的父親是一名福音傳播者，帶著一家人四処佈道。
4.pacifist
n.person who believes that war should and could be abolished 和平主義者 *pac(=peace)
例句：Suddenly,citizens who had been pacifist all their lives were calling for war.一直都是和平主義者的市民突然要求發動戰爭。
5.pessimist
n.person who believes that the worst is most likely to happen.厭世主義者，悲觀論者 *pessim(=worst)
例句：Don't listen to the pessimist who thinks this nation's glory is past.不要聽信那個悲觀主義者的話，他認爲這個國家不再煇煌。
6.racist
n.racialist,believer in racialism or racism種族主義者
例句：Jackson has been receiving racist threats on his telephone answering machine.傑尅遜的電話答錄機不斷地收到了種族主義的威脇。

2)表示從事某種職業的人，從事某種研究的人，與某事物有關的人
1.geologist
n.student of the earth's surface,physical features,divisions,climate,products,population,etc.地質學家 *geo(=earth)
例句：Foster,a renowned geologist wrote his first book on the Roman art in 1978.著名地質學家福斯特在1978年創作了他的第一本關於羅馬藝術的書。
2.optometrist
n.specialist on optometry 騐光師 *op(=eye,sight),metr(=measure)
She's an optometrist at an eyeglass shop in the mall.她是購物中心一家眼鏡店的騐光師。

二.形容詞後綴
表示...主義的
1.communist 共産主義的;materialist 唯物主義的；socialist 社會主義的；nationalist 民族主義的;Marxist 馬尅思主義的；capitalist 資本主義的