Lack of physical intrusion or invasion.

Absence of psychological influence or impact.

Non-acceptance in a competitive market context.

Failure to understand deeper meanings or concepts.

State where barriers remain intact and unbreached.

**Non-penetrating injury**: An injury that does not break the skin.

**Non-penetrative sex**: Sexual activity without vaginal or anal penetration.

**Non-penetration barrier**: Protective layer preventing substance entry.

**Non-penetrable material**: Substance incapable of allowing passage through it.

**Non-penetrating radiation**: Radiation unable to pass through certain materials.