n.憂愁；苦惱

Unhappiness seems to be particularly common in car companies, which suffer from global overcapacity, and telecoms companies, which are being buffeted by a technological revolution. 憂愁似乎在遭受全球產(chǎn)能過(guò)剩的汽車公司尤為普遍，而電信公司又受技術(shù)革新打擊。

His dark looks are a reflection of his unhappiness. 他陰郁的神情是內(nèi)心苦惱的反映。

The unhappiness burnout causes can eventually threaten your job, your relationships, and your health. 這種苦惱的精疲力盡到最后可以威脅到你的你工作，你的友誼，和你的健康。