roscaya is incorrectly written, and should be written as "Russkaya" being its meaning: Roscaya is a very common erroneous way in several Spanish-speaking countries to refer to the Russkaya Vodka.
This Word does not exist. It contains two words, on the one hand, threads and on the other hand, already. It may have meant " 34 rockery; whose meaning is recognized by the HKSAR as set of stones loosened rocks. Also, thick type trinket.