Possibly a substratum word, akin to Albanian bulëz. Numerous other theories exist, none of which are satisfactory: a link to Russian бу́лка (búlka), Polish bułka; or from a Vulgar Latin *bulgius, from Latin buga (cf. French bouge, Italian bolgia); or a Vulgar Latin *balteum; or *bullidus, from bulla (as with solz from solidus); or Albanian *buljëzë; or a Gepid *bultia. It may be derived from a German word (cf. Spanish bulto) through a Slavic intermediary, cf. Russian булыжник (bulyžnik). It is more likely an internal derivation from bolf, itself of Slavic origin or an expressive creation, through a form *bulh, bulg with plural bulgi that was remade into a singular.
bulz n (plural bulzuri) bulz m (plural bulzi)
| singular | plural | |||
|---|---|---|---|---|
| indefinite articulation | definite articulation | indefinite articulation | definite articulation | |
| nominative/accusative | (un) bulz | bulzul | (niște) bulzuri | bulzurile |
| genitive/dative | (unui) bulz | bulzului | (unor) bulzuri | bulzurilor |
| vocative | bulzule | bulzurilor | ||