1) to speak, say
Part of Speech: verb
A primary verb (used only in the definite past tense, the others being borrowed from G2046, G4483 and G5346); to speak or say (by word or writting): - answer, bid, bring word, call, command, grant, say (on), speak, tell. Compare G3004.
These two sites give similar information, with the definition from several dictionaries and statistics on the use of the word.
Perseus Digital Library
University of Chicago's Logion lexicon
Thayer's dictionary plus other information.
From this site's dictionary (in Italian)
Click on the first column to search for that word as a form of the root ἐπω; click on the second column to search for that grammatical form of the root ἐπω; click on the third column to search for that word and grammatical form; click on the total to search for the root ἐπω.