adj.不快樂的；悲傷的；陰郁的
His mouth corners curved in his highly individual, cold, almost mirthless smile . 他嘴角一抿，露出極為獨(dú)特的，幾乎是悶悶不樂的淡笑。
We have been fed up with the mirthless routine work all day long. 我們受夠了整天沉悶的日常工作。
