impregnablyadv.
/ɪmˈprɛɡnəbli/ In an impregnable manner; so as to be impregnable; invincibly, unconquerably.
ΘΚΠ
the world > action or operation > safety > [adverb] > invulnerably
impregnably1602
inexpugnably1653
impassibly1677
invulnerably1847
unassailably1874
charmedly1876
untouchably1909
1602 J. Marston Hist. Antonio & Mellida Induct. sig. A4v So impregnably fortrest with his own content.
1661 J. Stephens Hist. Disc. Procur. 26 They make that Custome..impregnably strong.
a1711 T. Ken Anodynes in Wks. (1721) III. 445 Patient, resign'd, and humble Wills, Impregnably resist all Ills.
1822 P. B. Shelley Hellas 49 If Greece must be A wreck, yet shall its fragments re-assemble, And build themselves again impregnably In a diviner clime.
This entry has not yet been fully updated (first published 1899; most recently modified version published online March 2018).
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adv.1602