This is the 3308th most frequent Japanese word.
成
"成" means "to become," "to achieve," or "to form."
成を遂げる (to achieve success) - The word '成' is used as part of a set phrase where it signifies a successful result or achievement.
彼の努力が成を遂げた。
His efforts came to fruition.
成績 (grades or results) - The word '成' here relates to 'achievement' or 'results,' often used in academic or performance contexts.
成績が良いです。
The grades are good.
成すべき (must do or achieve) - In this context, '成' is used in a verb form indicating 'to accomplish.'