causing or tending to cause sleep; tending to dull awareness or alertness

I thought this would be an appropriate word for Thanksgiving, what with the turkey and mashed potatoes putting everyone to sleep. Imagine my surprise when Ben chose “The Tale of the Flopsy Bunnies” for his bedtime story. Here is the first sentence of the story: It is said that the effect of eating too much lettuce is ‘soporific.’