an old Root, δα to learn, Lat. disco, which becomes Causal, to teach, Lat. doceo, in redupl. aor2 δέδαε and in διδάσκω:
I.to learn, and in perf., to know; c. gen. pers. to learn from one, Od.; c. gen. rei, to hear tidings of a thing, Il. From δέδαα again is formed a pres. mid. inf. δεδάασθαι, to search out, c. acc., Od.—The pres. in this sense is διδάσκομαι.