ethnicgroup

As an adjective indigene is

indigenous.

As a noun indigene is

indigenous person, native, indigene.

As an adjective incorruptible is

not subject to corruption or decay.

As a noun incorruptible is

(historical) one of an ancient religious sect of alexandria, whose adherents believed that the body of christ was incorruptible, and that he suffered hunger, thirst, and pain only in appearance.

Ethnicgroup is likely misspelled.

Ethnicgroup has no English definition.

As a noun tribe

is a socially, ethnically, and politically cohesive group of people.

As a verb tribe

is to distribute into tribes or classes; to categorize.