This is the 4110th most frequent Japanese word.
マスト
"マスト" means "must" or "something essential or required."
In this sentence, 'マスト' is used as a loanword from English meaning 'essential' or 'necessary', describing something critical for achieving success.
これは成功へのマストステップです。
This is a must step for success.
Here, 'マスト' is used to emphasize the importance of reading a particular book, functioning as a descriptor for necessity or importance.
その本は読むのがマストだと思います。
I think that book is a must-read.
In this example, 'マスト' indicates a strong recommendation or essential action, reflecting a sense of indispensability in the context.