In·com·men·su·ra·ble a. Not commensurable; having no common measure or standard of comparison; as, quantities are incommensurable when no third quantity can be found that is an aliquot part of both; the side and diagonal of a square are incommensurable with each other; the diameter and circumference of a circle are incommensurable.
They are quantities incommensurable. --Burke.
-- In*com*men*su*ra*ble*ness, n. -- In*com*men*su*ra*bly, adv.