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Being such that attack, seizure, or capture is possible; vulnerable or assailable: a pregnable fortress.

[Middle English preignable, pregnabul, from Old French prenable, pregnauble, from prendre, to grasp, from Latin prehendere, prēndere; see ghend- in Indo-European roots.]

preg′na·bil′i·ty n.


capable of being assailed or captured
[C15 prenable, from Old French prendre to take, from Latin prehendere to lay hold of, catch]
ˌpregnaˈbility n


(ˈprɛg nə bəl)

1. capable of being taken by force: a pregnable fortress.
2. open to rebuttal: a pregnable argument.
[1400–50; late Middle English prenable < Middle French pre(g)nable]
preg`na•bil′i•ty, n.
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Open to attack and capture because of a lack of protection:
References in periodicals archive ?
Research indicates that HCV affects kidneys, heart, bones, brain, and eyes--all highly pregnable organs in people with HIV infection (Figure 2).
47)--Calandrino is endowed with an eminently pregnable mind, an unfettered imagination, and a receptivity to ideas that in a less doltish person might easily pass for idealism, but has garnered Calandrino the reputation of a credulous fool (upon hearing of Calandrino's simplicity, the sharp-witted Maso del Saggio immediately resolves to dupe him "o fargli credere alcuna nuova cosa" 8.
During the course of the meeting, issues pertaining to military exercises and other professional capabilities, contacts between each other and making defense more pregnable came under discussion, sources added.