↑ Petar Skok, Etimologijski rječnik hrvatskoga ili srpskoga jezika, Z., 1971, v. 2, p. 261: lagum
Etymology
Borrowing from Ottoman Turkishلغم(lağım), from Ancient Greekλᾰγών(lagṓn, “cavity”)[1]. ((Can this(+) etymology be sourced?)Arabicلغم) Compare obsolete or dialectal Bulgarianлагъм(lagǎm, “underground tunnel”).