What does モンスター mean?
モンスター is a Japanese noun meaning “monster; monstrosity” in English. It can also be translated as “giant, monsterlike” depending on context. It is written as モンスター in hiragana, and monsutaa in romaji. This word is part of JLPT N1 vocabulary.
Example sentence
世界中のモンスターと戦えるのかぁ・・・。腕がなるなぁー。
Fighting with monsters all over the world ... I just can't wait.