Comparative evidence

seu̯ḱ

• Lat. sūgō -ere ‘suck’ (OLD: 1864)

• Lat. sūcus -ī, m. ‘the liquid content of a plant’, ‘animal substance’, ‘juice’ (OLD: 1859)

References

OLD = Glare, P. G. W. 1968. Oxford Latin Dictionary. Oxford: Clarendon Press.