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Examples
In a sentence
Som si istý, že Tom na nás nezabudol.
I'm sure Tom hasn't forgotten about us.
Ja som si istý, že budeš spokojný.
I am sure that you will be satisfied.
Som si celkom istý.
I'm pretty sure.
Examples from Tatoeba (CC BY 2.0 FR).
Source
Slovak National Corpus (SNK) ↗English gloss from the frequency publish path. Example sentences from Tatoeba (CC BY 2.0 FR).
Full attribution on References.