bring up short

baffle beat bewilder conquer defeat discomfit disconcert down drop dumbfound fell flatten ground level nonplus overthrow prostrate puzzle stump throw

bowl over bring down knock down lay low

clarify clear up encourage enlighten explain explicate

baffle confound dumbfound mystify perplex puzzle

foil nonplus outwit stagger stick stop stymie

clarify clear up enlighten explain explicate

aid assist encourage help