Where does “diagonala” come from?

diagonala (Polish) comes from French diagonal, from Latin diagōnālis, from Ancient Greek διαγώνιος, from Ancient Greek δῐᾰ-, from Ancient Greek διά, from Proto-Indo-European dwís, from Proto-Indo-European dwóh₁ — two.

diagonala (Polish): diagonal

Definitions

diagonal

Ancestry of “diagonala”, step by step

Step	Language	Word	Meaning
1	French	diagonal	diagonal, transverse, oblique
2	Latin	diagōnālis	diagonal
3	Ancient Greek	διαγώνιος	from angle to angle
4	Ancient Greek	δῐᾰ-	apart; through, across; through; in different...
5	Ancient Greek	διά	throughout
6	Proto-Indo-European	dwís	twice, doubly; in two
7	Proto-Indo-European	dwóh₁	two

Every word from Proto-Indo-European dwóh₁ →Every word from Ancient Greek δῐᾰ- →Every word from Proto-Indo-European dwís →