Word Origin & History
opportune
c.1408, from L. opportunus "favorable," from the phrase ob portum veniens "coming toward a port," in reference to the wind, from ob "to, toward" + portus "harbor." Opportunist (1881) and opportunism (1870) both borrowed from It. opportunismo, a word in It. politics, later applied in Fr. to Gambetta (1881) and then generally in Eng. to any who seek to profit from the prevailing circumstances.