Reconstructible grammaticalisation processes in Cushitic (Afroasiatic) concern mainly the pronominal and verbal domains, markers of subordination, adpositions, questions words and discourse particles. This presentation, based on the investigation of the various sources, targets and paths of 70 grammaticalization processes in Beja, the sole representative of North Cushitic, compared with similar phenomena in three other branches of Cushitic, Central, Highland East and Lowland East, will focus on the most salient grammaticalisation processes. They will be compared with the list provided H d Ku 's (2002) l x c f l gu g s f w ld, w other literature about the languages of the Horn of Africa where Cushitic languages are spoken. Four main features of grammaticalization in Cushitic that emerge from this investigation will be discussed: (i) the nominal domain, which can be a source of grammaticalization, but not (or hardly) the case for targets; (ii) auxiliaries, in particular the quotative verb that shows a vast array of functions, which are often the source of the renewal and enrichment of the verbal system, as opposed to verbless clauses which are pervasive in other Afroasiatic families, namely Semitic and Egyptian (Cohen 1984); (iii) quotative verbs, which have a strong tendency to grammaticalise at different levels of the language structure: verbs, complex sentences, discourse, including functions unattested in other genetic stocks; (iv) the fact that Cushitic languages show a per s s c l k b w 's y' d 'pu p s ' large.