Sentence:  On impious realms and barbarous kings impose / Thy plagues, and <WSD>curse</WSD> 'em with such sons as those. 
Meaning of the word marked with <WSD> tags:  To bring great evil upon; to be the cause of serious harm or unhappiness to; to furnish with that which will be a cause of deep trouble; to afflict or injure grievously; to harass or torment.