Same word as insipid:
anemic, arid, banal, beige, blah, bland, characterless, colorless, commonplace, dead, drab, driveling, dry, feeble, flat, ho-hum, inane, innocuous, jejune, lifeless, limp, mild, mundane, nebbish, nothing, ordinary, plain, pointless, prosaic, prosy, slight, soft, spiritless, stale
anemic, arid, banal, beige, blah, bland, characterless, colorless, commonplace, dead, drab, driveling, dry, feeble, flat, ho-hum, inane, innocuous, jejune, lifeless, limp, mild, mundane, nebbish, nothing, ordinary, plain, pointless, prosaic, prosy, slight, soft, spiritless, stale