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free of charge

In a sentence
Vstup do múzea je bezplatný.
Admission to the museum is free of charge.
Bezplatný kurz slovenčiny začína v pondelok.
The free Slovak course starts on Monday.
Parkovanie pred knižnicou je bezplatné do dvoch hodín.
Parking in front of the library is free of charge for up to two hours.
Bezplatný vstup platí pre študentov.
Free entry applies to students.
Source
Slovak National Corpus (SNK) ↗English gloss from the frequency publish path. Hand-reviewed example sentences.
Full attribution on References.