The state or degree of being complicated or intricate; complexity of a problem, structure, or relationships.
システムの複雑さが増すと、バグも発生しやすくなる。
As the system's complexity increases, bugs are more likely to occur.
人間関係の複雑さに疲れてしまった。
I'm tired of the complexity of human relationships.
問題の複雑さを一つずつ整理して解決した。
We sorted through the complexity of the issues one by one and resolved them.