敛色屏气

Explanation: Put away the smile, hold your breath. Described as cautious fear, do not dare 　　Usage: Joint type; as predicate; describe the care 　　Source: Song Ouyang Xiu, "the magistrate Jiangning House gift Shangshu Bing Department of Yuanwai Lang Jurong Princes epitaph": "County rape ho, grabbing colors are breath-hold, that the right of the phase ring, not guilty of public law." Thesaurus:  Convergence of Voice hold one's breath