Where does “pohjapiirustus” come from?

pohjapiirustus (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.

pohjapiirustus (Finnish): floor plan, layout of a building, schematic of a building

Definitions

floor plan, layout of a building, schematic of a building

Ancestry of “pohjapiirustus”, step by step

pohjapiirustus traces back through two separate lines of ancestry.

via Finnish piirustus

Step	Language	Word	Meaning
1	Finnish	piirustus	a drawing; the act of drawing
2	Finnish	piirustaa	To draw, sketch
3	Finnish	piiru	rafter; point; angular mil, mil
4	Russian	пир	feast, banquet
5	Old East Slavic	пиръ	—
6	Proto-Slavic	pirъ	fest; party

via Finnish pohja

Step	Language	Word	Meaning
1	Finnish	pohja	bottom; bed; fundament
2	Proto-Finnic	pohja	bottom; base, foundation; north
3	Proto-Finno-Permic	pošja	—

Every word from Proto-Slavic pirъ →Every word from Old East Slavic пиръ →Every word from Russian пир →