noun, noun which may take the genitive case particle 'no'
total illiteracy
Yojijukugo meaning complete inability to read or write; often used in formal or literary contexts to describe someone who is entirely illiterate.
He is totally illiterate and cannot even write his own name.
In old farming villages, there were many people who were completely illiterate.
文盲 also means illiteracy but is more common and neutral; 一文不通 emphasizes total inability and is a yojijukugo with a literary feel.
A Sino-Japanese four-character expression meaning that one cannot understand even a single written character or passage, hence “completely illiterate.”