sibilum
From LSJ
λέγεται δὲ καὶ κλῶνας αὐτῆς θύραις ἢ θυρίσι προστεθέντας ἀποκρούειν τὰς τῶν φαρμάκων κακουργίας → its branches attached to doors or windows are said to repel the evil of spells
Latin > English
sibilum sibili N N :: hissing, whistling; hiss of contempt or disfavor
Latin > German (Georges)
sībilum, s. 2. sībilus.