blindside
1. [ verb ] catch unawares, especially with harmful consequences
Examples:

"The economic downturn blindsided many investors"

Related terms: surprise
2. [ verb ] attack or hit on or from the side where the attacked person's view is obstructed
Related terms: assail
Similar spelling:   blind_side
  blinder
  blind_eel
  Blenniidae
  blind_date
  blende
  blonde
  blind_bend
  blindly
  blinded
  blunder
  blender
  blinding
  Blennioidea
  blind_person
  blindworm
  blindness
  blindfolded
  blindfold
  Blondell
  Blundell
  blind_man
  blind_gut
  blind_alley
  blennioid
  blind_snake
  blind_curve
  blind_spot
  blunderer
  blind_drunk
  blended
  blind_trust
  blind_corner
  blunted