soporific

He talked about it in his soporific acceptance speech at the Republican National Convention:

Musty retreads of Ibsen and Chekhov, besides being counter to the maverick spirit of their play, can be soporific endurance tests.

It’s so effective a soporific that most nights I struggle to read for more than 10 minutes, which is both satisfying and maddening.

The smell of incense — a combination of frankincense and myrrh — leached from every corner of the space, creating a somewhat soporific effect.

He finished ahead of Alonso and Russell after a soporific race that provided little encouragement for those hoping for an exciting season, the longest in F1 history.