κατάρρευσις

From LSJ

γνοίης ὅσσον ὄνων κρέσσονες ἡμίονοι → you know how much better are donkeys from mules

Source

Greek (Liddell-Scott)

κατάρρευσις: -εως, ἡ, ἡ πρὸς τὰ κάτω ῥεῦσις, ῥοή, κατ. τοῦ αἵματος Ἐκκλ.