The name Sisyphus is generally explained as a reduplicated form of aocj)os (=" the very wise"); Gruppe, however, thinks it may be connected with cc-us (" a ' Virgil, Aen.
Some roots are reduplicated wholly or in part with a frequentative meaning, and there are traces of gemination of radicals.
In the Dvenos inscription the perfect of facio is _feted; here it is a reduplicated form with the same vowel as the present.
However in the new case of double copula preceding predicate adjective, the tendency would possibly be to create an inseparable reduplicated form.