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impregnable1

im·preg·na·ble1

impregnable1

 
pronunciation:
ihm preg n bl
features:
Word Parts
part of speech: adjective
definition 1: able to withstand any attack, as a fortress.
The highly fortified castle was thought to be impregnable.
synonyms:
indestructible, inviolable, invulnerable, tenable, unassailable
antonyms:
vulnerable
similar words:
imperishable, insurmountable, invincible, secure, solid, staunch, unconquerable
definition 2: absolutely secure, as a point or position in a debate.
synonyms:
incontestable, indisputable, invulnerable, irrefutable, unconquerable
antonyms:
shaky, vulnerable
similar words:
absolute, certain, indomitable, invincible, undeniable, unquestionable
derivations: impregnably (adv.), impregnability (n.)
Word Parts
The word impregnable contains the following parts:
im-2 Latin prefix that means not, without
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The prefix im-2 occurs in Latin loanwords. It is an assimilated form of in-2 used before roots beginning with the letter "m," "p," and "b." See in-2.
-able, -ible, -ble Latin adjective-forming suffix that means capable of being, doing, or undergoing
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The suffix -able , and its variants, is attached to Latin verb roots or English transitive verbs to form adjectives. (In a small set of cases, -able is attached to a noun, e.g. knowledgeable and marriageable.) For spelling purposes, it is useful to know that -able is more likely to be added to a whole English word (comparable , adorable ), while -ible is more likely to follow a bound root (visible , legible ). However,there are still many words which combine a root with -able (capable , inevitable ). The suffix -ity can be added to any adjective ending in -able , -ible , -ble to produce a corresponding noun ending in -ability, -ibility, -bility (possible + -ity > possibility; irrevocable + -ity > irrevocability.)
Show wordsHide wordsExample words:
admissible, adorable, amiable, amicable, audible, avoidable, believable, bearable, biodegradable, capable, calculable, cognizable, comparable, compatible, comprehensible, conformable, conversable, convertible, corrigible, credible, creditable, curable, dependable, despicable, disagreeable, disposable, divisible, eligible, explicable, flammable, flexible, illegible, illimitable, imaginable, immiscible, immovable, immutable, impalpable, impassable, impeccable, impermeable, impermissible, imperturbable, implacable, implausible, imponderable, impossible, impregnable, inalienable, inaudible, incapable, incalculable, incommunicable, incomprehensible, inconceivable, detectable, conceivable, incorrigible, incredible, incurable, indefeasible, indelible, indescribable, indestructible, indivisible, indomitable, ineligible, ineluctable, ineradicable, inescapable, inevitable, inexorable, inexpiable, inexplicable, infallible, inhospitable, inimitable, inscrutable, inseparable, insuperable, intangible, interminable, intractable, invaluable, invariable, invincible, invisible, irrefragable, irrefutable, irremissible, irreparable, irreversible, irrevocable, legible, likable, lovable, manageable, measurable, movable, navigable, notable, opposable, palpable, perishable, permissible, placable, portable, possible, potable, predictable, prescriptible, recognizable, remissible, reprehensible, reversible, risible, semipermeable, sensible, superable, susceptible, tangible, tenable, tolerable, tractable, transmissible, unsupportable, usable, viable, visible, washable, acceptable, affordable, allowable, reliable, remarkable, approachable, disputable, drinkable, durable, eatable, renewable, sustainable, unshakable