1. the quality or state of being complex; intricacy or complication

Examples

• The complexness of the legal system makes it difficult for ordinary people to navigate.
• She appreciated the complexness of the novel's plot and its multiple interweaving storylines.
• The complexness of modern technology requires specialized training to understand.
• Engineers had to account for the complexness of the structural design.
• The complexness of human emotions cannot be easily reduced to simple categories.