umteenth (adjective)

1. After defeating countless monsters, the hero finally arrived at the umteenth level of the enchanted tower.

2. The umteenth prophet appeared in the sacred texts, delivering a message of compassion and love.

3. In the umteenth episode of the popular anime series, the protagonist finally unleashes their hidden powers.

4. After telling the umpteenth knock-knock joke, the comedian had the entire audience laughing uncontrollably.