Synonyms of impregnable

impregnable

adjective

1

as in invincible

incapable of being defeated, overcome, or subdued

an impregnable fortress that had foiled one invader after another over the centuries

Synonyms & Similar Words

• invincible
• invulnerable
• unconquerable
• insurmountable
• bulletproof
• unstoppable
• unbeatable
• indomitable
• armored
• insuperable
• undefeated
• unassailable
• inviolable
• defended
• untouchable
• protected
• unbreachable
• guarded
• secure
• shielded
• unbeaten
• safeguarded
• safe
• unconquered
• unbowed
• unsubdued

Antonyms & Near Antonyms

• vulnerable
• susceptible
• unprotected
• open
• liable
• unsafe
• insecure
• unguarded
• vincible
• surmountable
• weak
• exposed
• helpless
• superable
• powerless
• defenseless
• imperiled
• imperilled

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• vulnerable
• susceptible
• unprotected
• open
• liable
• unsafe
• insecure
• unguarded
• vincible
• surmountable
• weak
• exposed
• helpless
• superable
• powerless
• defenseless
• imperiled
• imperilled

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2

as in dense

impossible to get through or into

the castle's supposedly impregnable walls

Synonyms & Similar Words

• dense
• impenetrable
• impervious
• impassable
• close
• impermeable
• sturdy
• thick
• impassible
• tight
• compact
• substantial
• solid
• compressed
• tough
• frozen
• hard
• rigid
• condensed
• unyielding
• inflexible
• stiff
• firm
• unbending

Antonyms & Near Antonyms

• permeable
• soft
• negotiable
• passable
• penetrable
• elastic
• flexible
• giving
• malleable
• porous
• pliable
• yielding
• squishy
• absorbent
• bendable

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• permeable
• soft
• negotiable
• passable
• penetrable
• elastic
• flexible
• giving
• malleable
• porous
• pliable
• yielding
• squishy
• absorbent
• bendable

See More

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