subliterate
adjective
sub·lit·er·ate ˌsəb-ˈli-tə-rət 
also -ˈli-trət
: less than fully literate : able to read or write only at a low level
help for subliterate students
subliterate noun
plural subliterates
Here, on the other hand, we have a tale about a subhuman apparently intended for subliterates. 
People Weekly
People Weekly 
Word History
First Known Use
1912, in the meaning defined above
- efficaciousnesses
- efficacities
- efficacity
- efficacy
- efficience
- efficiences
- efficiencies
- efficiency
- efficiency apartment
- efficiency apartments
- efficiency expert
- efficient
- efficient cause
- efficiently
- efficients
- effigial
- effigiate
- effigiation
- effigies
- effigurate
- effiguration
- effigurations
- effigy
- effigy mound
- Effigy Mounds National Monument