köken: Attested since the 1890s. A shortening of Abiturium n, itself short for Latin exāmen abiturium—in formal German of the 19th century rather found as Abiturientenexamen—, from abituriō (“to wish to leave”), desiderative construction of abeō (“to leave, go off”). For more, see also Abiturient. Compare Physikum.
köken: Inherited from Middle French bac, from Old French bas, bac- (“flat boat”), of obscure origin. Possibly from Vulgar Latin *baccu (“container”), from Latin bacar (“kind of wine glass”). Or, possibly borrowed from Celtic or Germanic, from Proto-Germanic *baką (“back, rear”).