cumulative (adjective)

1. The cumulative box office sales of the movie franchise have now reached over one billion dollars.

2. The author's cumulative knowledge of science fiction literature is evident in the intricate world-building of their novel.

3. With each book in the series, the author adds to the cumulative mythology of the fantasy realm.

4. Over time, their cumulative romantic gestures and expressions of love made their relationship stronger and more meaningful.