shadeless, twilit, cavelike, unpeopled, dankest, dank, moonlike, gaslit, comfortless, doorless, tomblike, darkened, depthless, shadowless, sunlit, dark, subterranean, sunless, unlighted, ceilinged, subaquatic, drear, dantean, stygian, airless, nonreflective, cyclopean, unnamable, gelid, watery, glary, dingy, claustrophobic, desolate, unlit, arcaded, trackless, featureless, dusty, foetid, cobwebbed, dreamless, untrodden, windowless, crenelated, unilluminated, unquiet, begrimed, balconied, uninviting, pathless, mouselike, unbeautiful, mazelike, abyssal, grimy, rubbly, podlike, fathomless, cavernous, phantasmagoric, dostoyevskian, cramped, lanternfish, walled, fetid, mildewy, dreary, starlit, mantled, unbreathable, horsehead nebula, moonless, moonlit, foodless, fogbound, rheumy, inhospitable, oneiric, hummock, cave dweller, lonely, snailfish, crepuscular, embanked, rimed, gemlike, illimitable, slummy, stiller, flyblown, mirrorlike, poop deck, unnameable, unpolarized, reverberant, jungly, uncarpeted, barren, drabbest, spotlit, trifid, lit, tenebrous, draughty, haunted, darksome, dim, gloomy, cheerless, enchanted

invisible, unseeable