当关 dāngguān guard a pass Origin Definitions Defs Strokes Stroke Words Sentences Sents 一夫当关，万夫莫开 yīfūdāngguān, wànfūmòkāi impregnable one man guarding the pass can prevent the passage of ten thousand; a strategic, easily defended position不正当关系 bùzhèngdàngguānxì illicit affair improper or illicit relationship