wishy washy, adrift, afloat, alternating, amorphous, banal, betwixt and between, capricious, changeable, changeful, dead, desultory, deviable, dilute, diluted, dizzy, dull, eccentric, enervated, erratic , fade, fair, fair to middling, fairish, fast and loose, fickle, fitful, flat, flavorless, flickering, flighty, flitting, fluctuating, fowl, freakish, giddy, gruelly, halfhearted, impetuous, impulsive, inane, inconsistent, inconstant, indecisive, indifferent, infirm, infirm of purpose, infirm of will, insipid, irregular, irresolute, irresponsible, jejune, lackluster, languid, listless, mazy, mediocre, medium, mercurial, middling, mild, milk-and-water, milky, moderate, modest, moody, mushy, namby-pamby, neutral, of a kind, of a sort, of sorts, pantywaist, pappy, passable, pulpy, rambling, respectable, restless, roving, sapless, savorless, scatterbrained, shapeless, shifting, shifty, shuffling, so-so, spasmodic, spiceless, spineless, spiritless, stale, tasteless, tedious, thin, tolerable, unaccountable, uncertain , uncontrolled, undependable, undisciplined, unfixed, unflavored, unpredictable, unreliable, unrestrained, unsavory, unsettled, unstable, unstable as water, unstaid, unsteadfast, unsteady, vacillating, vagrant, vapid, variable, vicissitudinary, vicissitudinous, volatile, wandering, wanton, washy, watered, watered-down, waterish, watery, wavering, wavery, wavy, wayward, weak, whimsical