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In a sentence
Nik nemôže slúžiť dvom pánom.
No man can serve two masters.
Veselé srdce slúži na zdravie.
A merry heart does good like a medicine.
Veselé srdce slúži na zdravie, zronený duch však kosti vysúša.
A cheerful heart is good medicine, but a crushed spirit dries up the bones.
Tento nástroj slúži na otváranie fliaš.
This tool serves for opening bottles.
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.