different between infallible vs bulletproof

English

Etymology

From Medieval Latin infallibilis, from Latin in- + fallibilis. Compare French infaillible.

Pronunciation

• (UK) IPA^(key): /?n?fa.l?.b(?)l/
• (US) IPA^(key): /?n?fæ.l?.b?l/

Adjective

infallible (comparative more infallible, superlative most infallible)

1. Without fault or weakness; incapable of error or fallacy.

   He knows about many things, but even he is not infallible.

2. Certain to produce the intended effect, sure.

   Try this infallible cure for hiccups.

Synonyms

• faultless
• perfect
• indefective

Antonyms

• fallible
• defective
• faultful
• faulty
• imperfect
• error-prone

Related terms

• infallibility
• infallibly

Translations

English

Alternative forms

• bullet-proof

Etymology

bullet +? -proof

Pronunciation

• IPA^(key): /b?l.?tp?u?f/
• Hyphenation: bul?let?proof

Adjective

bulletproof (comparative more bulletproof, superlative most bulletproof)

1. (of a material) Capable of withstanding a direct shot by a bullet fired from a gun.

   A bulletproof window.

   A bulletproof vest.

2. (idiomatic) Reliable, infallible, sturdy or error-tolerant.
3. (usually of an idea or concept) Unbreakable, very tough.

Synonyms

• (infallible): foolproof

Derived terms

• bulletproof hosting
• bulletproof host
• bulletproof vest

Translations

Verb

bulletproof (third-person singular simple present bulletproofs, present participle bulletproofing, simple past and past participle bulletproofed)

1. To make proof against bullets.
2. (slang) to make resistant to failure.

   We have to bulletproof this program before we let the users at it; check every input, catch every possible flaw...it must not fail in use.