irreducible
adj.describing something that cannot be made smaller, simpler, or less in amount. In math, it means a fraction that cannot be simplified further.
adj.incapable of being reduced in size, amount, or complexity. In mathematical contexts, it specifically refers to a fraction where the numerator and denominator share no common factors other than one.
“The fraction 3/4 is irreducible because it cannot be simplified further.”
“The professor explained that the problem was irreducible to a simple formula and required a more complex approach.”
“In logic, an irreducible argument is one that cannot be broken down into simpler premises without losing the essential structure of the original reasoning.”
From ir- + reducible.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.