intelligible (adj.)youdaoicibaDictYouDict[intelligible 词源字典]
late 14c., "able to understand," from Latin intelligibilis, intellegibilis "that can understand, that can be understood," from intellegere "to understand" (see intelligence). In English, sense of "capable of being understood" first recorded c. 1600. Related: Intelligibly.[intelligible etymology, intelligible origin, 英语词源]