Function:
Progressive aspect. Attach to the end of a verb and before a pronominal suffix.
Examples:
iwínašana ‘he was going’;
iwínaša ‘he is going’;
iwínašata ‘he will be going’. Used with stative verbs: iq̓ínuša ‘he sees’;
išúkʷaša ‘he knows’.
See more:
[NP /-sen/ (singular nominative); /-sik/, /-sin-/ (plural nominative); PS probably *šen ‘sit -(singular)’, cf. -ša ‘on, upon’, Klamath čV- ‘sit (sg.)’ (Barker 1963b:67).]