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cheerful

In a sentence
Veselé Vianoce!
Merry Christmas!
Želám vám veselé Vianoce!
I wish you a Merry Christmas.
Veselé Vianoce aj vám!
Merry Christmas to you as well!
Veselé srdce slúži na zdravie.
A merry heart does good like a medicine.
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.