uneducated; lack of education
Describes a person who has not received proper schooling or the state of being uneducated. Can be used as a noun or adjectival noun.
He is uneducated but very clever.
Even an uneducated person can succeed with effort.
無教養 implies a lack of cultural refinement or breeding, whereas 無教育 is more about the lack of schooling.
Compound of 無 (mu, 'without') and 教育 (kyōiku, 'education'). The exact historical derivation is uncertain, but the word follows a common Sino-Japanese pattern for negation.