8. 1. Rhotacism. An original s between vowels became r; as,--

arbōs, Gen. arboris (for arbosis);
genus, Gen. generis (for genesis);
dirimō (for dis-emō).

2. dt, tt, ts each give s or ss; as,--

pēnsum for pend-tum;
versum for vert-tum;
mīles for mīlet-s;
sessus for sedtus;
passus for pattus.

3. Final consonants were often omitted; as,--

cor for cord;
lac for lact.

4. Assimilation of Consonants. Consonants are often assimilated to a
following sound. Thus: accurrō (adc-); aggerō (adg-); asserō (ads-);
allātus (adl-); apportō (adp-); attulī (adt-); arrīdeō (adr-); afferō
(adf-); occurrō (obc-); suppōnō (subp-); offerō (obf-); corruō (comr-);
collātus (coml-); etc.

5. Partial Assimilation. Sometimes the assimilation is only partial.
Thus:--

a) b before s or t becomes p; as,--