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unhappy
In a sentence
Bol by som nešťastný, ale nezabil by som sa.
I'd be unhappy, but I wouldn't kill myself.
Bol nešťastný.
He was unhappy.
Tom nevyzerá, že by bol nešťastný.
Tom doesn't look like he's unhappy.
Tom je nešťastný.
Tom's unhappy.
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.