unhappiness, n. infelicity, misery, [distress], [sorrow], woe.
unhappy, a. infelicitous, [unfortunate]; [miserable], [wretched], [sad], [sorrowful], [disconsolate], woeful, distressed, heart-sick, [mournful], [lugubrious]; deplorable, [calamitous], [distressing], [grievous], inauspicious, unpropitious, malign.
unharmed, a. unscathed, inviolate, uninjured, [unhurt], intact, scathless.
unharmonious, a. inharmonious, [discordant], dissonant, [harsh].
unhealable, a. insanable, [incurable].
unhealthful, a. [unwholesome], insalubrious, unsanitary, [unhealthy], morbific, [pestiferous].
unhealthfulness, n. insalubrity, unwholesomeness.
unhealthy, a. [unhealthful], [unwholesome], insalubrious, [noxious], [noisome], [pestiferous], [pernicious], unsanitary, unhygienic, morbid, morbific, [pestilent], insalutary; [sickly], [unsound], [diseased], morbid, [invalid].
unheard of. unprecedented, exceptional; [unknown], [obscure].
unheeded, a. disregarded, ignored, [unnoticed].