cactus
From LSJ
νέῳ δὲ σιγᾶν μᾶλλον ἢ λαλεῖν πρέπει → it's fitting for a young man to keep silence rather than to speak (Menander)
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