**Preserved**: Maintained in original condition without decline.

**Untainted**: Free from contamination or corruption.

**Intact**: Remaining whole and undamaged; unaltered.

**Unimpaired**: Not weakened or damaged; fully functional.

**Undeteriorated**: Retaining original quality, not worn down.

**Pristine**: In perfect condition; untouched by use or decay.

**Sound**: Healthy and robust, free of defects.

**Non-degraded state**: Condition of being unaltered or intact.

**Non-degraded instance**: Example illustrating preservation without decline.

**Non-degraded environment**: Ecosystem free from damage or deterioration.

**Non-degraded material**: Substance that remains pure and unchanged.

**Non-degraded habitat**: Natural living space unaffected by external factors.

**Non-degraded data**: Information preserved in its original form.