杞人忧天

1.like the man of Qi who was haunted by the fear that the sky might fall -- to entertain imaginary or groundless fears; groundless worry; In the state of Qi there lived a man who, filled with apprehensions of the imminent fall of the sky and the consequent destruction of his hearth and home, was so vexed that he could neither eat nor sleep.; like the man in the state of Qi worrying in case the sky should fall; superfluous worry; The man of Qi was afraid that the heavens were about to fall on him -- excessive anxiety.; The man of Qi worried in case the sky should fall -- unnecessary worry.; The man of Qi worried lest the sky would fall.; unnecessary anxiety; with unwarranted anxiety; worry for nothing about trouble that may not come