köken: From по- (po-) + *перёк (*perjók, “crosswise”), from Proto-Slavic *perkъ. Underlying root found in Old East Slavic перекъ (perekŭ, “width, crossbeam”) as well as Belarusian пе́рек (pjérjek, “across”); Ukrainian пере́ка (peréka, “contradiction”); Church Slavonic прѣкꙑ (prěky, “across”); Bulgarian пря́ко (prjáko, “straight, across”); Serbo-Croatian при̏јек (“steep”); при̏јекӣ (“straight, nearest”);…