cumulatively (adverb)

1. The comedian told three hilarious jokes, and the laughter cumulatively built throughout the audience.

2. In Greek mythology, the Twelve Labors of Hercules cumulatively showcased his incredible strength and bravery.

3. Each creepy incident in the haunted house cumulatively increased the terror of the visitors.

4. Through thoughtful gestures and heartfelt words, their love for each other cumulatively grew stronger over time.