wishy-washy

bland, dull

Synonyms: banal, characterless, cowardly, enervated, feeble, flat, flavorless, indecisive, ineffective, ineffectual, insipid, irresolute, jejune, languid, listless, mediocre, namby-pamby, sapless, spiritless, tasteless, thin, vacillating, vapid, watered-down, watery, wavering, weak, weak-kneed

Antonyms: dynamic, exciting, interesting, lively