Rigor: A word with two different but related meanings in medicine: 1. A chill, usually with shivering, as at the onset of high fever and chills. 2. Rigidity, as in rigor mortis, the rigidity of a body after death. The alternate spelling rigour is chiefly British. From the French, from the Latin rigor, meaning stiffness, from rigere, to be stiff.
-ine is a suffix used in chemistry to denote two kinds of substance. The first is a chemically basic and alkaloidal substance.
inÂ·herÂ·ent. (Ä­n-hÃ®râ²Ént, -hÄrâ²-) adj. Existing as an essential constituent or characteristic; intrinsic: the dangers inherent in the surgery; the inherent instability of financial markets. [Latin inhaerÄns, inhaerent-, present participle of inhaerÄre, to inhere; see inhere.] inÂ·herâ²entÂ·ly adv. inherent.