1. plural of inertness; the quality or state of being inert; lack of activity, energy, or responsiveness
Usage: typically used in formal or technical contexts
2. in physics, the property of matter by which it resists changes in motion or state
Usage: technical; physics

Examples

• The inertnesses of the various chemical compounds were tested in the laboratory.
• Despite repeated encouragement, the team's inertnesses prevented any real progress.
• The inertnesses of the objects made it difficult to accelerate them quickly.
• We observed the inertnesses of the gases under different temperature conditions.
• The patient's mental inertnesses were a concern for the medical team.
• The inertnesses of bureaucratic systems often slow down necessary reforms.