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”);…
çekim: karşılaştırma loodrechter · üstünlük loodrechtst
eş: verticaal, haaks, rechthoekig
köken: From lood (“plumb bob”) + recht (“straight”). Purism introduced by Simon Stevin in the 16th century to replace the Dutch word perpendiculair (“perpendicular”) which was a borrowing from Latin perpendiculum.