This paper describes the word formation p r ocesses, i. e . affix ation,rncompoundi ng, and reduplicatio n, in Gedeo . 1t is organized in sixrnc h a pters . The fir st ch a pter p re sents the in t roductory statemen ts inrnwhich the b ack g round, objective, s ignifi can ce, m e thodolo gy, andrnlimitation of th e thesis are stated . In the second chapter, e a rlie r accountsrnof works o n the phonology and morpho lo gy o f Gedeo, alon g with b ri efrndescript io n s of th e people, th e a r ea, a nd the la n guage are discussed .rnSome theoretical issues of th e present study h ave a lso been tre atedrnunder t his cha pte r. The third chapter deals with affixation in G e deo,rnwhere suffixation is the only process to take place . Different suffixe s wi thrna categorical status Pf,f Vl f, and Aaf are identifie d in the language, andrns e rved to de rive nominal, verbal , and adjectiva l forms. Since suffixes arernconsidere d as heads of deriva tion, based on lexicalists' view, all thernd e riv a ti ves 111 Gedeo take the feature of their suffixes by fe a turernp e rcola tion. The fourth_ chapter is concerned with compound fo=ation .rnAbout four compound classes, which include compound nouns, verbs,rnadjectives, a nd ad ver.b:s , are attested in the language. The fifth chapterrndiscusses t he possible reduplication processes in Gedeo, where bothrnpartial a nd complete reduplications are identifie d . Finally, chapter sixrnpresents a conclusion.