לַפִּיד
From LSJ
Λάλει τὰ μέτρια, μὴ λάλει δ', ἃ μή σε δεῖ → Modestus sermo, et qualis deceat, sit tuus → Sprich maßvoll, spricht nicht aus, was unanständig ist
English (Strong)
or lappid; from an unused root probably meaning to shine; a flambeau, lamp or flame: (fire-)brand, (burning) lamp, lightning, torch.