Comparative evidence

h₁u̯er, h₂u̯er, h₃u̯er

• Lat. operiō -īre ‘shut’, ‘close’, ‘cover’, ‘clothe’, ‘conceal’ (OLD: 1252)

• Lat. aperiō -īre ‘open’, ‘free’, ‘disclose’ (OLD: 145)

References

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