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. 51.hexa-:six. 52.homo-:same. 53.hyper-:above,beyond. 54.hypo-:under. 55.hydr(o)-:relating to water or hydrogen. 56.in-:into;negative,not,without. 57. infr(a)-:under,after. 58. inter-:between,among.(enter-,intel-) 59. intr-:within,inward. 60. iso-:equal,same.