n.

1. 糾紛；混亂；複雜（化）[U][C]
   We cannot allow further complication of this matter.

   我們不能讓這件事變得更複雜了。

2. 【醫】併發症[C]
   Incorrectly triaged patients could sustain further injury and complications.

   檢傷分類不正確的傷患可能蒙受傷勢惡化及併發症。

3. （新出現的）困難，障礙[C]
   Both parents work, which adds complications to their family life.

   父母都工作，這給他們的家庭生活增添了困難。

4. （戲劇、小說情節發展中出現的錯綜複雜的）糾葛

n.

1. a circumstance that complicates something; a difficulty.
   ▸a confused or complex state.
2. Medicine  a secondary disease or condition aggravating an already existing one.