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necessary
In a sentence
Rezervácie sú nutné.
Reservations are necessary.
Je to nutné?
Is that necessary?
Na vstup je nutný platný občiansky preukaz.
A valid ID card is necessary for entry.
Nutné opravy domu sme odložili na jar.
We postponed the necessary house repairs until spring.
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.