Definition: involving a lot of different parts, in a way that is difficult to understand Level: B1
我不得不填写这张非常复杂的表格。
I had to fill in this really ___complicated form.
这些规则相当复杂，难以遵循。
The rules are rather ___complicated to follow.
这段关系有点复杂。
The relationship is a bit ___complicated.
