Could someone explain native attributes?

[ck07]

E.g., "indulgent." Can't find in Civilopedia, manual, or the first 10 pages of the forums.

 

[trexeric]

E.g., "indulgent." Can't find in Civilopedia, manual, or the first 10 pages of the forums.

I don't play Colonization.

 

[Londonade]

Impressionable
+100% native conversion rate from Missions
Free promotion of Grenadier I for Mounted, Melee, and Gunpowder Units

Indulgent
-50% cost of purchasing land
Free promotion of Formation for Mounted, Melee, and Gunpowder Units

Gracious
+100% gold at first European contact
Free promotion of Ranger I for Mounted, Melee, and Gunpowder Units

Prosperous
Yields +300% Treasure when settlements are captured
Free promotion of Minuteman I for Mounted, Melee, and Gunpowder Units

Mentor
-50% time needed living among natives to learn a skill
Free promotion of Mountaineer I for Mounted, Melee, and Gunpowder Units