Etymology: French & Late Latin; French insipide, from Late Latin insipidus, from Latin in- + sapidus savory, from sapere to taste — more at sage
1. lacking taste or savor ; tasteless <insipid food> 2. lacking in qualities that interest, stimulate, or challenge ; dull, flat <insipid prose> • insipidity noun • insipidly adverb 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>.
New Collegiate Dictionary. 2001.