certain in Czech
certain in Czech
jistý
Sure in one's mind, positive; absolutely confident in the truth of something.
nějaký
(euphemism, preceded by "a") Used to denote that the speaker is referring to a specific person or thing that they do not want to name directly, implying that the listener should infer the identity of the referent.
jistý
Having been determined but not specified.
určitý
Having been determined but not specified.