hollowest (adjective) hollow: empty, hollowed out
Sinonime: atramentous, brunet, charcoal, clouded, coal,
dingy, dusky, ebon,
ebony, inklike, jet,
livid, melanoid,
murky, obsidian, onyx, piceous,
pitch, pitch-dark, raven, sable, shadowy, slate, sloe,
somber, sombre, sooty, starless, stygian, swart, swarthy
Antonime: white