- impervious
- adj1. impassable, impenetrable, impermeable, inaccessible, imperviable; jungly, jungled, overgrown; trackless, pathless, wayless, untrodden.2. proof, resistant, tight, airtight, snug, compact, hermetic, hermetically sealed; closed, shut, locked, sealed, sealed-off; solid, hard, rock-hard, adamantine; unporous, watertight, waterproof; punctureproof, im-perforable, imperforate, unpierceable, holeproof.3. imperishable, indestructible, indissoluble, inextinguishable, infrangible, unbreakable; enduring, lasting, abiding, everlasting, eternal, immortal, deathless, undying.4. callous, calloused, thickskinned, insensitive, unfeeling, hard, hard-hearted, hardened, inured, indurate, stony, flinty, steely; cold-hearted, cold-blooded, cold, frigid, frosty, icy, unsympathetic, unresponsive; uninfluenceable, unswayable, unmovable; unpliable, inflexible, unyielding, obdurate, unpersuadable; unre-ceptive, unamenable, closed to.
A Note on the Style of the synonym finder. 2014.