| 4. 
                        Nouns derived from verbs | 
                     
                      | There are certain nouns derived 
                        by suffixing a derivative to the verb stem. They form 
                        one class. The verbs that take -p-future tense marker 
                        take -pu as the noun derivative. | 
                     
                      | 
                           
                            | na  a |  |  | 'to 
                              walk' |   
                            | na  a-pu | > | na  apu | 'behaviour' |   
                            | kayi |  |  | 'to 
                              become bitter' |   
                            | kayi-pu | > | kayipu | 'bitterness' |   
                            | payi |  |  | 'to 
                              become hungry' |   
                            | payi-pu | > | payipu | 'hunger' |   
                            | pile |  |  | 'to 
                              cover' |   
                            | pite-pu | > | pitepu | 'hudder' |   
                            | pa  i |  |  | 'to 
                              learn' |   
                            | pa  i-pu | > | pa  u | 'learning' |  | 
                     
                      |  | 
                     
                      | The verbs take -v- future tense 
                        marker take -vu or -i as the noun derivative suffix. Among 
                        them -u ending verbs take -i as the noun derivative suffix 
                        and others take -vu as the noun derivative suffix. | 
                     
                      | 
                           
                            | ba:ndu |  |  | 'to 
                              itch' |   
                            | ba:nd 
                              -i | > | bandi | 'coconut 
                              scrapper' |   
                            |  ira:   u |  |  | 'to 
                              scratch' |   
                            |  ira:   -i | > |  iran  i | 'coconut 
                              scrapper' |   
                            | ute |  |  | 'to 
                              break' |   
                            | u  e-vu |  | u  evu | 'crack' |  | 
                     
                      |  | 
                     
                      | 5. Nouns derived 
                        from agentiviser | 
                    
                      | The nouns derived from agentivizer 
                        form one class. There is only one agentivizer in Yerava 
                        -ka:r. By suffixing this agentivizer to certain nouns, 
                        the nounstems to which masculine and feminine singular 
                        derivational suffixes could be suffixed are derived. |