patchy, sparse, sporadic, subpar, sketchy, inconsistent, iffy, nonexistent, uneven, abysmal, unreliable, poor, lousy, erratic, shaky, mediocre, scant, unimpressive, lackluster, intermittent, undependable, inadequate, sluggish, crummy, sloppy, limited, flaky, deficient, haphazard, dismal, weak, muddled, woeful, fitful, shoddy, rocky, scarce, imperfect, infrequent, tepid, slow, atrocious, hazy, stellar, tenuous, slipshod, scattershot, ineffective, anemic, murky, inept, scanty, horrid, problematic, lax, plentiful, checkered, crappy, screwy, unforthcoming, insufficient, scattered, laggardly, muted, lukewarm, uninspiring, hamstrung, stunted, rudimentary, bad, stagnant, solid, streaky, improved, ropey, unsatisfactory, cloudy, flakey, questionable, disjointed, imprecise, diminished, bugginess, tardy, dogged, abundant, bumpy, steady, stingy, widespread, unreachable, decent, scratchy, pitiful, wonky, strained, impeccable, slapdash, nitpicky, blurry, unspectacular, persistent, diffuse, blotchy, consistent, asymmetrical, chequered, mottled, unremarkable, unsystematic, creditable, accumulative, anaemic, anecdotal

defile, maculate, smatter, stain, sully, tarnish