What does rūthēnicus mean in Latin?

rūthēnicus, a adjective, means “of or pertaining to Rus (any of the medieval East Slavic principalities and their people); Ruthenian”.

How do you pronounce rūthēnicus?

In classical Latin, [ruːˈtʰeː.nɪ.kʊs]; in ecclesiastical (church) Latin, [ruˈtɛː.ni.kus].

adjectivefirst/second-declension adjective

rūthēnicus (feminine rūthēnica, neuter rūthēnicum)

Classical[ruːˈtʰeː.nɪ.kʊs]Ecclesiastical[ruˈtɛː.ni.kus]

adjectivehistoricalof or pertaining to Rus (any of the medieval East Slavic principalities and their people)
adjectivehistoricalRuthenian
adjectiveusuallyBelarusian
adjectiveusuallyRussian
adjectiveusuallyRusyn
adjectiveusuallyUkrainian

singular
form	masculine	feminine	neuter
nominative	ruthēnicus	ruthēnica	ruthēnicum
genitive	ruthēnicī	ruthēnicae	ruthēnicī
dative	ruthēnicō	ruthēnicae	ruthēnicō
accusative	ruthēnicum	ruthēnicam	ruthēnicum
ablative	ruthēnicō	ruthēnicā	ruthēnicō
vocative	ruthēnice	ruthēnica	ruthēnicum

plural
form	masculine	feminine	neuter
nominative	ruthēnicī	ruthēnicae	ruthēnica
genitive	ruthēnicōrum	ruthēnicārum	ruthēnicōrum
dative	ruthēnicīs	ruthēnicīs	ruthēnicīs
accusative	ruthēnicōs	ruthēnicās	ruthēnica
ablative	ruthēnicīs	ruthēnicīs	ruthēnicīs
vocative	ruthēnicī	ruthēnicae	ruthēnica

Rūthēnī + -icus, ultimately from Old East Slavic роуси́нъ (rusínŭ).