prospekt
In Russia, a broad, multilane and very long straight street in urban areas, which serves as an arterial road.
It is not a fashionable quarter, but it contains wide Prospekts, bordered by good houses, as well as some important public buildings, amongst which are the Exchange and the University.
Where it comes from
From Russian проспе́кт (prospékt). Doublet of prospect and prospectus.
Adapted from the Wiktionary entry prospekt (CC BY-SA 4.0).