Summary: Merriam-Webster's Word of the Day for February 25, 2013 is: idiopathic \id-ee-uh-PATH-ik\ adjective 1 : arising spontaneously or from an obscure or unknown cause 2 : peculiar to the individual Examples: "Some dogs have idiopathic epilepsy, which means there's no real explanation for their seizures, though even a reasonably mild stressor may increase the odds of a seizure." From an article by Steve Dale in the Orlando (Florida) Sentinel, November 13, 2012 "Juvenile idiopathic arthritis, diagnosed before age 16, causes chronic swelling of the joints along with redness, [Dr. Hilary] Haftel said." From an article by Amanda Whitesell in the Livingston County (Michigan) Press, January 11, 2013 Did you know? "Idiopathic" joins the combining form "idio-" (from Greek "idios," meaning "one's own" or "private") with "-pathic," a form that suggests the effects of disease. The combining form "idio-" is typically found in technical terms. Examples include "idiographic," meaning "relating to or dealing with something concrete, individual, or unique"; "idiolect," meaning "the language or speech pattern of one individual at a particular period of life"; and "idiotype," meaning "the molecular structure and conformation of an antibody that confers its antigenic specificity." A more common "idio-" word is "idiosyncrasy," which most commonly refers to an unusual way in which a person behaves or thinks, or to an unusual part or feature of something.
