bulletproof

(bo̵olit pro̵̅o̅f′)

adjective

that bullets cannot pierce

transitive verb

to make bulletproof

See bulletproof in American Heritage Dictionary 4

adjective
  1. Impenetrable by bullets.
  2. Informal Impervious to assault, damage, or failure; guaranteed: a bulletproof method; bulletproof arguments.
transitive verb bul·let·proofed, bul·let·proof·ing, bul·let·proofs
To make impenetrable by bullets.

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