LJLA also נתב, surely a hypercorrection. See also s.v. נשף. Page refs. in other dictionaries: DJPA: 361a; DJBA: 778a; Jastrow: 938; Levy Ch-W: 2:131; Tal Sam: 549b; Cook,Qumran: 161;
mšb, mšbˀ (maššaḇ, maššəḇā) n.m. bellows, blowing