This is the 4807th most frequent Japanese word.
決心
Determination or resolution.
Here, 決心 emphasizes the firm resolve or commitment to pursue a positive outcome.
彼女はよりよい未来のために決心を固めた。
She strengthened her resolve for a better future.
In this sentence, 決心 is used to indicate the decision made after considering one's aspirations or goals.
彼は医者になることを決心しました。
He decided to become a doctor.
決心 here refers to the resolution or determination to initiate a specific effort or action.