Ὁ κόσμος σκηνή, ὁ βίος πάροδος· ἦλθες, εἶδες, ἀπῆλθες → The world is a stage, life is your entrance: you came, you saw, you departed (Democritus fr. 115 D-K)
adv.
By chance: P. and V. τύχῃ, P. κατὰ τύχην.
At random: P. and V. εἰκῆ.
Remark casually, v.; P. παραφθέγγεσθαι (absol. or acc.).