piirustussali (Finnish) comes from Finnish piirustus, from Finnish piirustaa, from Finnish piiru, from Russian пир, from Old East Slavic пиръ, from Proto-Slavic pirъ — fest; party.
piirustussali (Finnish): drawing room, drawing hall room where engineers draw up plans
Definitions
drawing room, drawing hall room where engineers draw up plans
Ancestry of “piirustussali”, step by step
piirustussali traces back through two separate lines of ancestry.