Where does “пшеничный” come from?
пшеничный (Russian) comes from Russian пшени́ца, from Old East Slavic пьшеница, from Proto-Slavic pьšenica, from Proto-Indo-European peys- — to grind, to crush.
пшеничный (Russian): wheat, wheaten
Ancestry of “пшеничный”, step by step