soporiferous

One of these, Erdaviraph, a young but holy prelate, received from the hands of his brethren three cups of soporiferous wine.

As we did not speak above a whisper, a very soporiferous proceeding, I was not surprised that both Toby and William fell asleep.

Happily, however, that soporiferous monotony is beginning to get obsolete.

If I rouse not now, I must have more soporiferous qualities than the Sleepers!