Vapid (adjective)

Lacking liveliness, interest, or flavor; dull.

Origin:

Late 17th century: from latin vapidus, from vapor "steam". .

Examples:

1. The movie was vapid and uninteresting.
2. The conversation was vapid and unengaging.
3. The lecture was vapid and failed to hold the audience's attention.
4. The book was vapid and forgettable.
5. The party was vapid and lacked any real excitement.