expression, i-adjective
uneducated; lacking learning; ignorant
Used to describe someone who lacks formal education or broad knowledge. Often carries a slightly critical or self-deprecating tone.
彼は学がないが、とても賢い。
He is uneducated, but very clever.
学がないので、難しい本は読めません。
I can't read difficult books because I'm not well-educated.
無学 is a noun/adjectival noun meaning 'uneducated' or 'illiterate', often more formal and direct than 学がない, which is a phrase describing a state.
教養がない emphasizes a lack of cultural refinement or broad knowledge, while 学がない focuses more on formal education or academic learning.
Phrase composed of 学 (learning, scholarship) + が (subject marker) + ない (not exist). Literally 'there is no learning'.