CEDICT
愁悶不安。《晉書.卷七四.桓彝傳》:「彝嘗去職,至廣陵尋親舊,還遇風,停浦中,累日憂悒。」也作「憂鬱」。
重編國語辭典
This thing can't be rushed; it needs long-term planning.
Source: Tatoeba