胸无点墨xiōng wú diǎn mò

completely illiterate;uneducated; unlearned; unlettered; without any learning
❍ 因为市上的书贾，都是～的，只知道什么书销场好，利钱深，却不知什么书是有用的，什么书是无用的。(吴趼人《二十年目睹之怪现状》161) It occurred to me that the ordinary book-vendors were all uneducated and that all that they were after was profit. They did not know,nor did they care,which books were useful.

• knock over
• know
• know about
• knowledge
• knowledgeable
• known
• known for
• known to sb.
• know of
• know of
• L
• lab
• label
• labeling
• labor
• laboratory
• laborer
• laborious
• labour
• labourer
• lack
• lack confidence in
• lady
• laid
• lain