bulletproof

[bool-it-proof] / ˈbʊl ɪtˌpruf /

ADJECTIVE

armored

Synonyms

STRONG

protected shielded

WEAK

indestructible invulnerable ironclad steel-plated strong unbreakable

Antonyms

WEAK

breakable unarmored unprotected weak

ADJECTIVE

impenetrable

Synonyms

STRONGEST

impassable impervious

WEAK

close compact firm hard hermetic impermeable inviolable solid substantial thick unpiercable

Antonyms

STRONGEST

open

WEAK

clear comprehensible intelligible penetrable permeable porous soft thin understandable

ADJECTIVE

invincible

Synonyms

STRONGEST

impassable impregnable indomitable invulnerable irresistible unassailable unbeatable untouchable

WEAK

insuperable inviolable powerful strong unattackable unconquerable undefeatable unsurmountable unyielding

Antonyms

STRONGEST

beatable

WEAK

breakable conquerable destructible

ADJECTIVE

invulnerable

Synonyms

STRONGEST

impassable impenetrable impregnable indestructible unbeatable untouchable

WEAK

powerful secure strong

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

I have a bulletproof portfolio that is 100% in large-cap U.S. stocks and I live off the dividend income.

From MarketWatch • Jun. 3, 2026

With its bulletproof reputation, the software has spread to factory floors and other workplaces that value safety, precision and tech that won’t glitch.

From The Wall Street Journal • May 2, 2026

The president and other top officials have said a Secret Service officer was shot as the attacker charged a security checkpoint at the hotel, and that he survived thanks to a bulletproof vest.

From BBC • May 1, 2026

"Everything's drone proof and bulletproof," an animated Trump said of the ballroom.

From Barron's • Mar. 31, 2026

I took in the spectacle: thousands and thousands of pounds of metal, a squad of commandos, bulletproof everything.

From "Becoming" by Michelle Obama

bulletproof

Example Sentences

Related Words