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In a sentence
Hrad sa oplatí navštíviť.
The castle is worth visiting.
Nevzdám sa, pretože mám niečo, za čo sa oplatí bojovať.
I won't give up because I have something worth fighting for.
Tá investícia sa im oplatila už po roku.
That investment paid off for them after just one year.
Oplatím ti peniaze, ktoré si mi požičal.
I'll pay back the money you lent me.
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.