perplexity       
noun [ C or U ] uk/pəˈplek.sə.ti/ us/pɚˈplek.sə.t̬i/
 困惑,混乱
a state of confusion or a complicated and difficult situation or thing
  She stared at the instruction booklet in complete perplexity. 她一脸茫然地盯着说明书。 
 the perplexities of life 生活中令人困惑的事物