köken: 15th century, backformation from the older pairs Missetäter/Übeltäter and Wohltäter/Guttäter. Equivalent to Tat (“deed”) + -er (“-er”, agent suffix). Compare Dutch dader (also a backformation).
criminal (person guilty of a crime, breaking the law)
çekim: çoğul престъ́пници
köken: From Proto-Slavic *perstǫpьnikъ; equivalent to престъ́пя (prestǎ́pja, “to cross, to step over”) + -ник (-nik). Literally, "one who crosses (the accepted norms/laws)".