Question particle (short for ente').
Often used together with question words. It is usually not translated into English.
The one asking is uncertain of capability or willingness of the respondent to answer the question or to fulfill the request. If one asks a person about what someone else said or did or what the opinion of another person is, it can be either te' or ke.
To'o te' (ke) me' pina'inne miya'an?
Is it really true what he is saying there? (More a rhetorical question or asking oneself.)
Hunit te' (ke) badju'ne inin?
What do you think, is this blouse of hers expensive?