PREFIX

　　1.a-:of;on;intensive;negative,not,without;ad-；ab-.

　　2.ab-:away from,off.

　　3. ad-:to;at;for.

　　4. aer(o)- :relating to air .

　　5.al-:all.

　　6.ambi-:on both sides,around.

　　7.amphi-:on both sides,around.

　　8.an-:negative,not,without.

　　9.ana-:upon,up,on.

　　10.ante-:before.

　　11.anti-:against.

　　12.arch-:chief,first .

　　13.astro- :relating to stars .(planets \space )

　　14.aqu(a)-:relating to water.

　　15.audi (o)-:relating to sound and hearing .

　　16.auto-:self,without help .

　　17.be-:to make;to cover with;upon;by;intensive.

　　18.bene-:well,good.

　　19.bi-:double,two.

　　20.bio- :relating to life and living things .

　　21.by-:less important ;near .

　　22.cata-:down,downwoards.

　　23.cent(i)-:hundred ,hundredth .

　　24.circum-:around,round about.

　　25.con-:together with,wholly.

　　26.contra-:against,opposit.(contro-,counter-)

　　27.cross-:through;across;many.

　　28.de-:down,downward;apart;negative;intensive.

　　29.deca-:ten.

　　30.deci- :tenth .

　　31.demi-:half.

　　32.di-:double,twice.

　　33.dia-:through,between,across.

　　34.dich(o)-:two.

　　35.dis-:apart; negative;intensive.

　　36.duo-:two,double.(du-,dou-,do-)

　　37.dys-:badly,ill.

　　38.en-:to make;to put in(on \around ).

　　39.epi-:upon.

　　40.eu-:well.

　　41.ever-:more and more,always.

　　42.ex-:out,outward;beyond;former.

　　43.extra-:beyond.

　　44.for-:away from.

　　45.fore-:before.

　　46.forth-:towards.

　　47.geo- :relating to earth .

　　48.hecto-:hundred.

　　49.hemi-:half.

　　50.hetero-:other,different.

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