βασανιστήριον
From LSJ
ἡ κέρκος τῇ ἀλώπεκι μαρτυρεῖ → you can tell a fox by its tail, small traits give the clue to the character of a person
English (LSJ)
τό,
A question-chamber, Theopomp.Com.63, Polyaen.8.62, Phalar.Ep.82, 115; of the stocks, Sm.Je.20.2. II in pl., instruments of torture, Plu.2.315d, Charito 4.2, Them.Or.13.175c. III touchstone, test, χρυσοῦ, πορφύρας ib.21.247b: metaph., ib.248a.