Definition of reducible
adjective
1 [predic.] (of a subject or problem) capable of being simplified in presentation or analysis:Shakespeare’s major soliloquies are not reducible to categories
2 Mathematics (of a polynomial) able to be factorized into two or more polynomials of lower degree. (of a group) expressible as the direct product of two of its subgroups.
Remember that
reducible ends with
-ible.