1. plural of inertia: the tendency of objects to remain at rest or in motion unless acted upon by an external force
Usage: physics
2. plural of inertia: lack of activity or unwillingness to move or act

Examples

• The different inertias of the objects affected how quickly they responded to the applied forces.
• Scientists measured the inertias of various materials in the laboratory.
• The team struggled to overcome the inertias that had developed in their work processes.
• Political inertias prevented the reforms from moving forward.
• The coach worked to break through the players’ mental inertias.
• Economic inertias made it difficult to implement new policies quickly.