Geifer

From LSJ

κέρκος τῇ ἀλώπεκι μαρτυρεῖ → you can tell a fox by its tail, small traits give the clue to the character of a person

Source

German > Latin

Geifer, a) eig.: saliva pinguis od. im Zshg. bl. saliva. -spuma (Schaum vor dem Munde). – b) uneig., v. boshaften Reden: pus atque venenum (Hor. sat. 1, 7, 1).