insusceptible

I am sure that he would be very insusceptible to proper domestic influences.

From Patsy by S. R. (Samuel Rutherford) Crockett

Investigation shows the opaque substances to be generally most susceptible, and the transparent materials, such as glass, rock-salt, tourmaline, &c. almost insusceptible, to the heating effect of the sun.

From The Energy System of Matter A Deduction from Terrestrial Energy Phenomena by James Weir

One is, to use non-humanized lymph, since the lower animals are insusceptible to syphilis.1 This is simple.

From A System of Practical Medicine by American Authors, Vol. I Volume 1: Pathology and General Diseases by Various

We speak of persons as susceptible or insusceptible to music as we speak of good and poor conductors of electricity; and the analogy implied here is particularly apt and striking.

From How to Listen to Music, 7th ed. Hints and Suggestions to Untaught Lovers of the Art by Henry Edward Krehbiel

It is insusceptible of rust, as gold and silver are, none of the acids affecting it, excepting the aqua regia.

From Memoir, Correspondence, And Miscellanies, From The Papers Of Thomas Jefferson, Volume 1 by Thomas Jefferson Randolph