irredutível

Etymology
From.

Adjective

 * 1) irreducible that cannot be reduced or decomposed further or that cannot return to its primitive state
 * 2)  irreducible said of the numerical fraction whose terms are prime to each other, and which, therefore, is not simplifiable
 * 3) irreducible that is intransigent; that is insensitive to opposing arguments or opinions
 * 4)  unsubmissive; indomitable
 * 1)  unsubmissive; indomitable