Given the latest JUNO implication for normal neutrino mass ordering, we parametrize three neutrino masses in a flavor cuboid: m₁ = m₀ sinξ, m₂ = m₀ cosξ sinζ and m₃ = m₀ cosξ cosζ. We find that this cuboid is able to accommodate both neutrino mass degeneracy and tribimaximal flavor mixing in its cubic limit with ξ_* = arctan(1/√2) ≃ 35.26^∘ and ζ_* = 45^∘. Assuming θ₁₂ = ξ and θ₂₃ = ζ for the two large angles of neutrino oscillations and expanding them around ξ_* and ζ_*, we propose a viable ansatz which predicts a normal but nearly degenerate neutrino mass spectrum and a nearly tribimaximal neutrino mixing pattern. Testing the achieved correlation among ξ_* - θ₁₂, ζ_* - θ₂₃ and Δ m²₂₁/Δ m²₃₁ will provide a smoking gun for the validity of this ansatz.