insipid

synonyms insipid , vapid , flat , jejune , banal , inane mean devoid of qualities that make for spirit and character. insipid implies a lack of sufficient taste or savor to please or interest <an insipid romance with platitudes on every page>. vapid suggests a lack of liveliness, force, or spirit <an exciting story given a vapid treatment>. flat applies to things that have lost their sparkle or zest <although well-regarded in its day, the novel now seems flat>. jejune suggests a lack of rewarding or satisfying substance <a jejune and gassy speech>. banal stresses the complete absence of freshness, novelty, or immediacy <a banal tale of unrequited love>. inane implies a lack of any significant or convincing quality <an inane interpretation of the play>.