מוּסָר
From LSJ
εὖτ' ἂν ὑπὸ τοῦ κακοῦ κτεινέωνται → when the disease is proceeding towards a fatal termination
English (Strong)
from יָסַר; properly, chastisement; figuratively, reproof, warning or instruction; also restraint: bond, chastening ((-eth)), chastisement, check, correction, discipline, doctrine, instruction, rebuke.