to make something more difficult to deal with, do, or understand
The bad weather complicated finishing the job quickly.
Adding more features to the software might complicate the user interface, making it less intuitive for new users.
Failing to address the issue promptly could complicate the relationship between the two business partners.
The unexpected change in regulations threatens to complicate the company's plans for expansion.
Trying to involve too many stakeholders in the decision-making process may complicate the project and slow down progress.
