incommensurable (adj.)

"having no common measure," 1550s, from French incommensurable (14c.) or directly from Medieval Latin incommensurabilis, from in- "not, opposite of, without" (see in- (1)) + Late Latin commensurabilis, from Latin com "with, together" (see com-) + mensurabilis "measurable," from mensurare "to measure," from Latin mensura "a measuring, a measurement; thing to measure by," from mensus, past participle of metiri "to measure" (from PIE root *me- (2) "to measure"). Related: Incommensurably.