Old Caraamutu is the archaic form of Caraamutu used before the era of Classical Caraamutu, which would become the dominant language within the Caayukuri Isles. It was spoken from about 2500BK to 800BK, where it would gradually evolve into the various Caraamutu dialects.
The syllable structure of Old Caraamutu is C(A)V(S), where A represents any approximant and S represents either an approximant or nasal. As most if not all roots and forms that are cognate to other Caayukuri languages are of the structure CV(A), it is likely that this syllable structure is influenced by either the Latian languages or some of the Ular Dialects.