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In a sentence
Na otázku odpovedala racionálne.
She answered rationally.
Celý problém vysvetlil racionálne.
He explained the whole problem rationally.
Pri stretnutí sa zachovali racionálne.
They behaved rationally at the meeting.
Svoj názor povedal racionálne, ale pokojne.
He stated his opinion rationally, but calmly.
Source
Slovak National Corpus (SNK) ↗English gloss from the frequency publish path. Hand-reviewed example sentences.
Full attribution on References.