Comparative evidence

kei̯h₂, ḱei̯h₂

• Lat. cieō -ēre ‘move’, ‘set in motion’, ‘stir up’, ‘summon’, ‘excite’ (OLD: 313-314)

• Lat. ciō -ere ‘move’, ‘set in motion’, ‘stir up’, ‘summon’, ‘excite’  (OLD: 316)

References

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