לַפִּיד

From LSJ

Λάλει τὰ μέτρια, μὴ λάλει δ', ἃ μή σε δεῖModestus sermo, et qualis deceat, sit tuus → Sprich maßvoll, spricht nicht aus, was unanständig ist

Menander, Monostichoi, 328

English (Strong)

or lappid; from an unused root probably meaning to shine; a flambeau, lamp or flame: (fire-)brand, (burning) lamp, lightning, torch.