sterile

Short definition from Wiktionary

Adjective

1. 1
   Unable to reproduce (or procreate).
2. 2
   Terse; lacking sentiment or emotional stimulation, as in a manner of speaking.
3. 3
   Fruitless, uninspiring, or unproductive.
4. 4
   Germless; free from all living or viable microorganisms.
5. 5
   Permanently uninhabitable (as in a planet like Earth) to all life, including even microbes.
6. 6
   Free from dangerous objects, as a zone in an airport that can be only be entered via a security checkpoint.
7. 7
   Of weapons: foreign-made and untraceable to the United States.