戒备森严 jièbèisēnyán heavily guarded Origin Definitions Defs Strokes Stroke Words Sentences Sents 1 sentence 后宫戒备森严，普通人无法进入。 hòugōng jièbèisēnyán, pǔtōngrén wúfǎ jìnrù. The harem was heavily guarded, and ordinary people could not enter. Source: Dong Chinese Dictionary