cactus

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

Source

Latin > English (Lewis & Short)

cactus: i, m., = κάκτος,
I a prickly plant with edible stalks, etc., found in Sicily, Spanish artichoke: Cynara cardunculus, Linn.; Plin. 21, 16, 57, § 97.—
II Trop., any thing thorny, unpleasant: eradicato omni cacto et rubo subdolae familiaritatis, Tert. Pall. 2 fin.>

Latin > English

cactus cacti N M :: cardoon (Cynara cardunculus), Spanish artichoke; anything thorny/unpleasant