あいにく (translations)→ pity regrettably unfortunately
しょんぼり (translations)→ alone dejectedly forlornly
しんみりと (translations)→ quietly softly
むざんに (translations)→ cruelly viciously
残念ながら (translations)→ alas bitterly sad unhappily
悲しげな (translations)→ melancholy pathetic plaintive saddened
悲しげに (translations)→ aggrieved bleakly mournfully pathetically plaintively woefully
力なく (translations)→ despairingly droopingly helplessly lifelessly slackly weakly