What does 活躍 mean?
活躍 is a Japanese noun meaning “activity” in English. It can also be translated as “walking about with great vigor” depending on context. It is written as 活躍 in kanji, かつやく in hiragana, and katsuyaku in romaji. This word is part of JLPT N3 vocabulary.
Example sentence
仕事でご活躍ですね。
I see you're doing very well in your business.