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.
An inflectional suffix is sometimes called a desinence or a grammatical suffix. Examples. English: Girls, where the suffix -s marks the plural. He makes, where suffix -s marks the third person singular present tense. It closed, where the suffix -ed marks the past tense. French: De beaux jours, where the suffix -x marks the plural.