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.
Ese is a demonstrative adjective, it's always followed by the noun: Ese libro.Its feminine is esa, and its plural is esos. Eso is a demonstrative neuter pronoun: it replaces the noun: MuÃ©streme eso. Also note that both Ã©se and eso are demonstrative pronouns.