#attrition  the act of rubbing together; wearing something down by friction
  supertype:  #detrition__friction__rubbing  effort expended in rubbing one object against another
     supertype:  #elbow_grease__elbowgrease__effort__exertion__travail__sweat  use of physical or mental energy; hard work; "he got an A for effort"; "they managed only with great exertion"
        supertype:  #toil__labor__labour  productive work (especially physical work done for wages); "his labor did not require a great deal of skill"
           supertype:  #work  activity directed toward making or doing something; "she checked several points needing further work"
              supertype:  #activity  any specific activity or pursuit; "they avoided all recreational activity"
                 supertype:  #human_action__humanaction__act__human_activity__humanactivity  something that people do or cause to happen
                    supertype:  pm#process__proces  situation commonly considered as making a change during some period of time
                       supertype:  pm#situation  something that "occurs" in a real/imaginary region of time and space
                          supertype:  pm#thing__something___T__t___3D_or_4D_thing_or_anything_else  any category (type or individual) is instance of this type; any type is also a subtype of this type
                       supertype:  pm#process_or_process_description
                          supertype:  pm#processing_thing
                             supertype:  pm#thing_playing_some_role  category to classify things according to roles/viewpoints; classification under this category is application-dependant
                                supertype:  pm#thing__something___T__t___3D_or_4D_thing_or_anything_else  any category (type or individual) is instance of this type; any type is also a subtype of this type
                    supertype:  sumo#process__proces__physicalsituation  intuitively, the class of things that happen and have temporal parts or stages; examples include extended events like a football match or a race, actions like pursuing and reading, and biological processes; sumo#process is not identical to pm#situation because an instance of pm#situation is not necessarily an instance of sumo#physical
                       supertype:  pm#situation  something that "occurs" in a real/imaginary region of time and space
                       supertype:  pm#process_or_process_description
                       supertype:  sumo#physical__physical_thing  an entity that has a location in space-time; locations are themselves understood to have a location in space-time; click here for more details on the identical category sowa#physical_thing
                          supertype:  pm#thing__something___T__t___3D_or_4D_thing_or_anything_else  any category (type or individual) is instance of this type; any type is also a subtype of this type

No statement uses or specializes #attrition; click here to add one.