Tenacious
Part of speech: adjective
Definition: clinging to an object or surface; adhesive unwilling to yield or give up; dogged holding together; cohesive having a good memory; retentive
Example sentence: I just think that with my wrestling background there's not going to be any doubt in my mind that if I have to go through a three round war that in the third round I'm gonna be more fresh, more tenacious, I'm gonna want that win more than anybody else I'm going to have to fight.
Unregenerate
Part of speech: adjective
Definition: which cannot be transformed in mind and spiritstubborn