This is the 17751st most frequent Russian word.
украинцем
"Украинцем" means "Ukrainian (male)" in English.
“Украинцем” is used in the instrumental case to denote a characteristic, indicating what someone identifies as.
Он гордится тем, что является украинцем.
He is proud of being Ukrainian.
“Украинцем” is used in the instrumental case to express comparison or equivalence in a specific scenario.
Меня перепутали с украинцем на конференции.
I was mistaken for a Ukrainian at the conference.
“Украинцем” is used in the instrumental case to denote association or relation with a certain identity.