1. lacking the ability or strength to move or act
2. showing no chemical activity; not reacting with other substances
Usage: chemistry
3. lacking energy, enthusiasm, or the ability to move or change

Examples

• The patient lay inert on the hospital bed.
• Noble gases like helium are chemically inert under normal conditions.
• The committee remained inert despite the urgent need for action.
• After the accident, his left arm was completely inert.
• The inert gas prevented the metal from oxidizing during welding.
• She felt inert and unmotivated after losing her job.
• The spacecraft drifted inert through space after losing power.