bulletproof

Definitions

adjective of a material Capable of withstanding a direct shot by a bullet fired from a gun.
adjective idiomatic reliable, infallible, sturdy or error-tolerant.
adjective Unbreakable, very tough.
verb To make proof against bullets.
verb slang to make resistant to failure.

bullet +‎ -proof

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The silk could also have applications in bulletproof vests and improved car airbags.

Scientists Incorporate Spider’s Silk-Spinning Genes Into Goats | Impact Lab 2010
Athletes arrived at the opening ceremony in bulletproof vans.

After setbacks, Commonwealth Games off to strong start in India Emily Wax 2010
If you sent Peter and Jane there to fly a kite, you'd kit them out in bulletproof vests first.

The Map That Came to Life 2008
If you sent Peter and Jane there to fly a kite, you'd kit them out in bulletproof vests first.

Archive 2008-10-01 2008
If you sent Peter and Jane there to fly a kite, you'd kit them out in bulletproof vests first.

Archive 2005-04-01 2005
If you sent Peter and Jane there to fly a kite, you'd kit them out in bulletproof vests first.

April 2005 2005
If you sent Peter and Jane there to fly a kite, you'd kit them out in bulletproof vests first.

Ladybird: Peter and Jane 2005
Simultaneously, FBI agents in bulletproof vests and carrying M-16s woke

Boing Boing: March 30, 2003 - April 5, 2003 Archives 2003
Antibalas - Spanish for "bulletproof" - is a high-energy, highly celebrated Afrobeat orchestra from Brooklyn.

BroadwayWorld.com Featured Content 2010
At the time, the chief executive of the Financial Services Authority (FSA), Hector Sants, argued this would make the bank "bulletproof" - although his view would prove overly optimistic.

unknown title 2009