Given the common meaning of the homograph as "punishment, chastisement" in all dialects, it is highly unlikely that the two isolated biblical examples cited by LS2 following other moderns to support this meaning in Syriac are correctly interpreted by them. But the scribes did confuse this spelling with mrwdw which does mean "rebellion;" see examples in the article in PSm. Note that Audo accepts the meaning, but rather hedges his bets. Earlier native lexicographers do not have it.