ὑπονομή
From LSJ
ξένος ὢν ἀκολούθει τοῖς ἐπιχωρίοις νόμοις → as a foreigner, follow the laws of that country | when in Rome, do as the Romans do
ἡ,
A underground passage, mine, Str.13.1.67, D.S.20.94. II metaph., in pl., secret stratagems or intrigues, Hsch. III burrowing of rabbits, Str.3.5.2.