cryptoporticus
From LSJ
ξένῳ δὲ σιγᾶν κρεῖττον ἢ κεκραγέναι → it's better for a stranger to keep silence than to shout (Menander)
cryptŏportĭcus: ūs, f. vox hibrida, from κρυπτός> and porticus,
I a covered gallery or passage, a vault, a hall, Plin. Ep. 2, 17, 16 sq.; 5, 6, 27 sq. al.
