√Sak 'be able'
present: [5.] Saknoti Saknuv/anti etc. V.+ perfect: SaS/Aka Sek/us etc. V.+ aorist: [1.] SagD/i etc. SakyAm -- [2.] /aSakat etc. V.+ Sak/eyam etc. Sakemahi -- [3.] aSISakat future: [1.] Sakzyati Sakzyate etc. -- [2.] SaktA verbal: Sakta E.+ Sakita E.+ -Saktave secondary: passive: Sakyate etc. E.+ Sakyati etc. -- intensive: SASak- -- desiderative: S/ikzati S/ikzate etc. V.+ SikzARa SiSikza Sikzyate etc. Sikzayati Sikzayate etc. E.+ -- causative: SAkayati derivatives: -S/aka Sakya U.S.+ S/Aka V. SAk/a RV. S/AkI? RV. S/acI V.+ SAci? RV. S/akti V.+ Sakt/i RV. S/akman RV. S/Akman RV. -S/ikman MS. Sagm/a V.B.S. Sakr/a V.+ Sikv/a AV. S/akvan V.B.S. S/ikvan V.B. S/ikvas RV. S/acizWa V.B.S. SikzA V.+ SIkzA B.+ Sikzaka E. -Sikzin C. SikzaRa C. SikzaRIya C. SikzeRya S. Sikz/u RV. Sikzuka GB. The desiderative Sikz has won a so independent use and value that it might well enough have been treated (like Bakz etc.) as a separate root. R. divide Sak (and Sikz) into two roots, the second meaning 'help'. but favor their ultimate identity.There are other groups of words, not connectable with this or any other verbal root: thus, Sakun/a, Sak/uni, Sak/unta, Sak/unti V.+; S/aka, Sak/an, S/akft V.+; SaNk/u V.+, Sakti ('spear') E.+