←
Proto-Germanic *ta (inherited)
←
Proto-Germanic *tō (inherited)
←
Middle High German ze (inherited)
←
Middle High German zuo (inherited)
←
East Central German zum (mention)
←
East Central German zur (mention)
←
Old High German za (inherited)
←
Old High German zi (mention)
←
Old High German zuo (inherited)
→
German jetzt (compound)
→
German zudem (compound)