perhaps from εὖ and τίθημι; straight, i.e. (literally) level, or (figuratively) true; adverbially (of time) at once:--anon, by and by, forthwith, immediately, straightway.
from ἐκ and the genitive case singular feminine of αὐτός (ὥρα being understood); from that hour, i.e. instantly:--by and by, immediately, presently, straightway.