This is the 7230th most frequent Russian word.
викторе
"Викторе" is the prepositional case of the name "Виктор" (Victor), meaning "about Victor" or "in Victor" depending on context.
The word "викторе" is in prepositional case, expressing the object of thought.
Я думаю о Викторе каждый день.
I think about Victor every day.
Here, "викторе" is also in prepositional case but is used in the context of a topic of discussion, specifying possession.
Мы говорили о высоком достижении Викторе.
We talked about the high achievement of Victor.
In this sentence, "викторе" would need correction to "Виктором" in instrumental case if meaning by Victor's effort, illustrating a common learner mistake in noun case usage.