Impregnable

[im-preg-nuh-buh l] /ɪmˈprɛg nə bəl/

adjective
1.
strong enough to resist or withstand attack; not to be taken by force, unconquerable:
an impregnable fort.
2.
not to be overcome or overthrown:
an impregnable argument.
[im-preg-nuh-buh l] /ɪmˈprɛg nə bəl/
adjective
1.
susceptible to , as an egg.
/ɪmˈprɛɡnəbəl/
adjective
1.
unable to be broken into or taken by force: an impregnable castle
2.
unable to be shaken or overcome: impregnable self-confidence
3.
incapable of being refuted: an impregnable argument
/ɪmˈprɛɡnəbəl/
adjective
1.
able to be impregnated; fertile
adj.

early 15c., imprenable “impossible to capture,” from Middle French imprenable “invulnerable,” from assimilated form of in- “not, opposite of” (see in- (1)) + Old French prenable “assailable, vulnerable” (see pregnable). With intrusive -g- 16c., on model of deign, reign, etc. Related: Impregnability.

Read Also:

Impregnate
[verb im-preg-neyt, im-preg-neyt; adjective im-preg-nit, -neyt] /verb ɪmˈprɛg neɪt, ˈɪm prɛgˌneɪt; adjective ɪmˈprɛg nɪt, -neɪt/ verb (used with object), impregnated, impregnating. 1. to make pregnant; get with child or young. 2. to fertilize. 3. to cause to be infused or permeated throughout, as with a substance; saturate: to impregnate a handkerchief with cheap perfume. 4. […]
Impregnates
[verb im-preg-neyt, im-preg-neyt; adjective im-preg-nit, -neyt] /verb ɪmˈprɛg neɪt, ˈɪm prɛgˌneɪt; adjective ɪmˈprɛg nɪt, -neɪt/ verb (used with object), impregnated, impregnating. 1. to make pregnant; get with child or young. 2. to fertilize. 3. to cause to be infused or permeated throughout, as with a substance; saturate: to impregnate a handkerchief with cheap perfume. 4. […]
Impregnated
[verb im-preg-neyt, im-preg-neyt; adjective im-preg-nit, -neyt] /verb ɪmˈprɛg neɪt, ˈɪm prɛgˌneɪt; adjective ɪmˈprɛg nɪt, -neɪt/ verb (used with object), impregnated, impregnating. 1. to make pregnant; get with child or young. 2. to fertilize. 3. to cause to be infused or permeated throughout, as with a substance; saturate: to impregnate a handkerchief with cheap perfume. 4. […]

Impregnation
[verb im-preg-neyt, im-preg-neyt; adjective im-preg-nit, -neyt] /verb ɪmˈprɛg neɪt, ˈɪm prɛgˌneɪt; adjective ɪmˈprɛg nɪt, -neɪt/ verb (used with object), impregnated, impregnating. 1. to make pregnant; get with child or young. 2. to fertilize. 3. to cause to be infused or permeated throughout, as with a substance; saturate: to impregnate a handkerchief with cheap perfume. 4. […]
Impregnator
[verb im-preg-neyt, im-preg-neyt; adjective im-preg-nit, -neyt] /verb ɪmˈprɛg neɪt, ˈɪm prɛgˌneɪt; adjective ɪmˈprɛg nɪt, -neɪt/ verb (used with object), impregnated, impregnating. 1. to make pregnant; get with child or young. 2. to fertilize. 3. to cause to be infused or permeated throughout, as with a substance; saturate: to impregnate a handkerchief with cheap perfume. 4. […]