fossorium
From LSJ
ἀλλὰ μὴν καὶ ἀναπαύσεώς γε δεομένοις ἡμῖν νύκτα παρέχουσι κάλλιστον ἀναπαυτήριον → and again, we need rest; and therefore the gods grant us the welcome respite of night
fossōrĭum, ĭī, n. (fossorius), instrument pour creuser, bêche, pioche : Isid. Orig. 20, 14, 7.