מוּסָר

From LSJ

εὖτ' ἂν ὑπὸ τοῦ κακοῦ κτεινέωνται → when the disease is proceeding towards a fatal termination

Source

English (Strong)

from יָסַר; properly, chastisement; figuratively, reproof, warning or instruction; also restraint: bond, chastening ((-eth)), chastisement, check, correction, discipline, doctrine, instruction, rebuke.