bulletproof

Adjective
  1. Without flaws or loopholes (synset 300594206)
    "an ironclad contract"; "a watertight alibi"; "a bulletproof argument"
  2. Not penetrable by bullets (synset 300145370)
    "bulletproof glass"; "bulletproof vest"
Verb
  1. Make bulletproof (synset 200166139)
    "bulletproof the car"

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