a. [UN-1 7 b.]
1. Not liable or open to assault.
1805. Ld. Grenville, in Dk. Buckingham, Mem. Geo. III. (1855), III. 457. I am confident that Toulon is absolutely unattackable with such a force as you speak of.
1862. Carlyle, Fredk. Gt., XIII. xii. (1872), V. 122. Height which he judged unattackable, and on the side of which he pitches his camp accordingly.
2. Not susceptible to the effects of detrimental or dissolvent agencies.
1881. Nature, XXIV. 249/1. The oxides formed on the surface may preserve it by their very presence, furnishing a sort of unattackable varnish.
1882. U.S. Rep. Prec. Met., 649. To make some of the particles of gold wholly unattackable by mercury.
Hence Unattackably adv.
1865. Carlyle, Fredk. Gt., XVIII. xiii. (1872), VIII. 56. So unattackably strong was this position at Klein Kamin.
