impregnable, inexpugnable
(adjective) incapable of being overcome, challenged or refuted; “an impregnable argument”; “impregnable self-confidence”
conceptive, impregnable
(adjective) capable of conceiving
impregnable, inviolable, secure, strong, unassailable, unattackable
(adjective) immune to attack; incapable of being tampered with; “an impregnable fortress”; “fortifications that made the frontier inviolable”; “a secure telephone connection”
Source: WordNet® 3.1
impregnable (comparative more impregnable, superlative most impregnable)
(of a fortress, wall, etc, also used figuratively) Too strong to be penetrated.
impregnable (comparative more impregnable, superlative most impregnable)
Capable of being impregnated.
Source: Wiktionary
Im*preg"na*ble, a. Etym: [F. imprenable; pref. im- not + prenable pregnable, fr. prendre to take, L. prehendere. See Comprehend, Get to obtain.]
Definition: Not to be stormed, or taken by assault; incapable of being subdued; able to resist attack; unconquerable; as, an impregnable fortress; impregnable virtue. The man's affection remains wholly unconcerned and impregnable. South.
– Im*preg"na*ble*ness, n.
– Im*preg"na*bly, adv.
Im*preg"na*ble, a. Etym: [See Impregnate.] (Biol.)
Definition: Capable of being impregnated, as the egg of an animal, or the ovule of a plant.
Source: Webster’s Unabridged Dictionary 1913 Edition
10 June 2025
(noun) the discipline that studies the principles of transmiting information and the methods by which it is delivered (as print or radio or television etc.); “communications is his major field of study”
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