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serious
In a sentence
Tom by mohol mať vážny problém.
Tom could be in serious trouble.
Klimatická zmena je vážny problém.
Climate change is a serious problem.
Situácia je vážna a vyžaduje rýchle rozhodnutie.
The situation is serious and requires a quick decision.
Hovoril vážnym tónom, ako keby sa niečo stalo.
He spoke in a serious tone, as if something had happened.
Examples from Tatoeba (CC BY 2.0 FR).
Source
Slovak National Corpus (SNK) ↗English gloss from the frequency publish path. Includes Tatoeba example sentences when present.
Full attribution on References.