Ereugomai means to pour forth, utter aloud, or belch out — the image is of something welling up from within and bursting out. It appears only in Matthew 13:35, where the evangelist quotes Psalm 78:2: 'I will open my mouth in parables, I will pour forth [ereugomai] things hidden since the creation of the world.' The Psalm verse reflects God's (or the psalmist's) speech as a welling-up outpouring of deep wisdom. The LXX uses ereugomai in Psalm 19:2: 'Day pours forth speech.'
Ereugomai captures the quality of divine speech as overflow — truth pressing out from a source so full it cannot be contained. Psalm 19:2 uses it for the constant daily outpouring of creation's testimony: the heavens 'belch forth' or 'pour out' speech. Matthew 13:35 applies this to Jesus' parabolic teaching: His parables are not clever human invention but the eschatological outpouring of wisdom hidden from before creation. This is the fulfillment of divine speech-act — the moment when what was concealed in the divine mind from eternity erupts into history through the teacher from Nazareth.