σ is pronounced [z] when followed by β, γ, δ, μ, ν, λ, ρ, μπ, ντ. This happens either within a word or across word boundaries διάβασμα, σβούρα, τις ντομάτες, τους μπαμπάδες Final ν followed by initial κ, π, τ makes them [b], [d], [g]….