complexity; degree of complication
Abstract noun derived from 複雑 (complex). Used to describe the state or degree of being intricate, involved, or difficult to understand.
この問題の複雑さには驚かされる。
I am amazed by the complexity of this problem.
システムの複雑さが増している。
The complexity of the system is increasing.
The complexity of the procedures is increasing.
The problem kept becoming more and more complex.
There is a need to reduce the complexity of the system.
It is difficult to understand the complexity of that problem.