σφαραγέομαι
From LSJ
θοῦ, Κύριε, φυλακὴν τῷ στόµατί µου καὶ θύραν περιοχῆς περὶ τὰ χείλη µου → set a guard over my mouth, Lord; keep watch over the door of my lips | set a guard, O Lord, over my mouth; keep watch over the door of my lips (Psalm 140:3, Septuagint version)
English (LSJ)
A burst with a noise, crackle, sputter, as liquids when thrown upon the fire, σφαραγεῦντο δέ οἱ πυρὶ ῥίζαι the roots of his eye crackled or hissed (when Odysseus burnt them with the hot stake), Od.9.390. II groan with fulness, to be full to bursting, οὔθατα γὰρ σφαραγεῦντο ib.440.