Usage: 5 forms in 11 verses
Form Translated As     In Verse(s)
ηδολέσχουν I conversed LXX.Ps.77.6
I meditated LXX.Ps.119.48
meditated LXX.Ps.69.12
ηδολέσχησα I meditated LXX.Ps.77.3
ηδολέσχει meditated LXX.Ps.119.23
αδολεσχήσω I shall meditate LXX.Ps.119.15
I will meditate LXX.Ps.77.12LXX.Ps.119.27
shall meditate LXX.Ps.119.78
αδολεσχήσαι to meditate LXX.Gen.24.63LXX.Lam.2.19

Liddell-Scott-Jones

ἀδολεσχέω (adolescheō) to meditate G:V

ἀδολεσχέω-λεσχέω [],

talk idly, prate, [Refs 5th c.BC+]

__II generally, talk, [LXX]
__III meditate,[LXX]

LSJ Scripture Refs: LXX.Ps.68.12*LXX.Gen.24.63LXX.Ps.118.15*