IRREDUCIBLE

[ir.re.duc.ible] adj (1633): impossible to transform into or restore to a desired or simpler condition "an ~ matrix"; specif: incapable of being factored into polynomials of lower degree with coefficients in some given field (as the rational numbers) or integral domain (as the integers) "an ~ equation" -- ir.re.duc.ibil.i.ty n -- ir.re.duc.ibly adv