From Old Silōs *-tū. Cognate to -tvōtōs, from *-two-to-s < *-tū-tū-s, and to -tvati, from *-two-ti < *-tū-ti. Possibly cognate to Carichendan -it ("past tense marker").
(West Nova Cemella) IPA: /tu/ [tu]
-tu