sadly

あいにく の訳語→ pity regrettably unfortunately

しょんぼり の訳語→ alone dejectedly forlornly

しんみりと の訳語→ quietly softly

むざんに の訳語→ cruelly viciously

残念ながら の訳語→ alas bitterly sad unhappily

悲しげな の訳語→ melancholy pathetic plaintive saddened

悲しげに の訳語→ aggrieved bleakly mournfully pathetically plaintively woefully

力なく の訳語→ despairingly droopingly helplessly lifelessly slackly weakly