soporific

/ˌsɑpəˈrɪfɪk/
adjective
  1. Causing sleep or drowsiness.
    • Warm milk is known for its soporific qualities before bedtime.
    • The professor's monotone voice had a soporific effect on the entire class.
    • The long car ride on a rainy afternoon was soporific, and I struggled to stay awake.
  2. Dull or boring; causing a lack of interest or energy.
    • The meeting was soporific, with endless charts and no discussion.
    • The documentary was so soporific that I fell asleep halfway through.
    • His soporific speech at the ceremony made everyone yawn.
noun
  1. A substance or drug that induces sleep.
    • He avoided taking soporifics because they made him groggy in the morning.
    • Some herbal teas act as natural soporifics.
    • The doctor prescribed a mild soporific to help with her insomnia.