dyslexia (n.)youdaoicibaDictYouDict[dyslexia 词源字典]
c. 1887, from German dyslexie (1883), from Greek dys- "bad, abnormal, difficult" (see dys-) + lexis "word," from legein "speak" (see lecture (n.)) + abstract noun ending -ia. Dyslexic (n.) is first recorded 1961; dyslectic (adj.) from 1964.[dyslexia etymology, dyslexia origin, 英语词源]