inactive
🇺🇸
/ɪnˈæktɪv/
🇬🇧
/ɪnˈæktɪv/
not active or not doing anything
The volcano has been inactive for 50 years, meaning it hasn't erupted.
not being used or not functioning
The oil well was declared inactive because it no longer produced oil.
having no effect or influence
The drug was found to be inactive against the bacteria, so a new treatment was needed.