nonplus (v.)

• addle
• amaze
• answer
• astonish
• astound
• baffle
• balk
• bamboozle
• beat
• blast
• boggle
• bother
• brave
• buffalo
• challenge
• check
• checkmate
• circumvent
• confound
• confront
• confuse
• confute
• contradict
• contravene
• controvert
• counter
• counteract
• countermand
• cross
• crush
• dash
• daze
• defeat
• defy
• demolish
• deny
• destroy
• discomfit
• disconcert
• discountenance
• dish
• dismay
• dismiss
• disrupt
• dumbfound
• elude
• faze
• finish
• fix
• floor
• flummox
• flurry
• fluster
• foil
• frustrate
• fuddle
• get
• jam
• knot
• lick
• maze
• muddle
• mystify
• overcome
• overthrow
• overturn
• overwhelm
• paralyze
• parry
• perplex
• pickle
• plight
• pother
• puzzle
• rattle
• rebut
• refute
• riddle
• ruin
• sabotage
• scotch
• scrape
• settle
• shock
• silence
• spike
• spoil
• squash
• squelch
• stew
• stick
• stonewall
• stop
• stump
• stun
• stymie
• subvert
• throw
• thwart
• undermine
• upset