ㄇㄨˋㄅㄨˋˋshìㄉㄧㄥdīng

  1. 比喻不識毫無學問參見不識一丁警世通言··秀才一朝交泰》:祖上也曾出仕富厚目不識丁讀書虛名。」醒世姻緣傳·第一》:若是那等目不識丁村氣就是王侯貴戚只是外面半分誠敬。」不識之無胸無點墨精通文翰

lit. the eye cannot recognize the letter T (idiom)​; totally illiterate
être illettré, analphabète
ungebildet , völliger Analphabet sein