rudity

The story

1. Latin · derived fromruditas“ignorance”
2. Old French · derived fromrudete
3. Middle English · inherited fromruditee
4. English todayrudity

From rude + -ity, from Middle English ruditee, ruditē, from Old French rudete, from Latin ruditas (“ignorance”), from rudis (“rude, illiterate”). First use appears c. 1450.