a. Not turned or changed about. [ R. ] Sir T. Browne. [ 1913 Webster ]
n. [ L. inconvertibilitas. ] The quality or state of being inconvertible; not capable of being exchanged for, or converted into, something else;
a. [ L. inconvertibilis: cf. F. inconvertible. See In- not, and Convertible. ] Not convertible; not capable of being transmuted, changed into, or exchanged for, something else;
n. Inconvertibility. [ 1913 Webster ]
adv. In an inconvertible manner. [ 1913 Webster ]