Origin: Anc Greek
δυς/dys(=prefix used with a negative sense meaning difficult, bad, abnormal, misfortune) > δύω/dyo(=decline) δύση/dysi(=sundown)
+λέξις/lexis(=word) >λέγω/lego(=speak, collect)
+ α/a(= feminine suffix)
Dyslexia is a generic term reffering to a person's learning disability to read, write, and spell despite at least average intelligence.