lugubrious

他穿着一身黑衣，带着一副阴郁的表情走了进来。

He walked in wearing all black with a ___lugubrious expression on his face.

她穿着那件黑色长裙，用lugubrious的语气讲述着昨天下雨的故事，搞得大家都很压抑。

She told the story of yesterday's rain in a ___lugubrious tone while wearing that long black dress, making everyone feel depressed.