He was accused of being disloyal to his friends after he shared their secrets with a rival.

The team's collapse was blamed on the manager's disloyalness, which poisoned morale and trust.

He disloyally revealed our plans to the rival company, causing the project to fail.

The committee investigated the disloyalties that had undermined the company's leadership.

A single disloyalty was enough to fracture the trust between the partners.