The Collaborative International Dictionary of English v.0.48:

Unsteady \Unsteady\
   See steady.

WordNet (r) 3.0 (2006):

unsteady
    adj 1: subject to change or variation; "her unsteady walk"; "his
           hand was unsteady as he poured the wine"; "an unsteady
           voice" [ant: steady]
    2: not firmly or solidly positioned; "climbing carefully up the
       unsteady ladder"; "an unfirm stance" [syn: unfirm,
       unsteady]

Moby Thesaurus II by Grady Ward, 1.0:

192 Moby Thesaurus words for "unsteady":
   adrift, afloat, alternating, amorphous, broken, canted, capricious,
   careening, catchy, changeable, changeful, changing, choppy,
   dancing, dangerous, desultory, deviable, deviating, deviative,
   deviatory, different, dilapidated, disconnected, discontinuous,
   disorderly, divaricate, divergent, diversified, diversiform, dizzy,
   doddering, doubtful, dubious, eccentric, erose, erratic,
   fast and loose, fickle, fitful, flickering, flickery, flicky,
   flighty, flitting, fluctuating, fluid, fluttering, fluttery,
   freakish, giddy, groggy, guttering, halting, hazardous, heeling,
   herky-jerky, heteroclite, ill-balanced, immethodical, impetuous,
   impulsive, inconsistent, inconstant, indecisive, infirm, insecure,
   insubstantial, intermittent, intermitting, irregular, irresolute,
   irresponsible, jagged, jerky, leaning, listing, lopsided, lurching,
   mazy, mercurial, mobile, moody, motley, moving, mutable,
   nonconformist, nonstandard, nonuniform, off-balance, overbalanced,
   patchy, perilous, pluralistic, precarious, protean, provisional,
   ragged, rambling, ramshackle, restless, ricketish, rickety, risky,
   rocky, rough, roving, scatterbrained, scrappy, shaky, shapeless,
   shifting, shifty, shuffling, slippery, snatchy, spasmatic, spasmic,
   spasmodic, spastic, spidery, spindly, spineless, spluttering,
   sporadic, spotty, sputtering, sputtery, staggering, teetering,
   teetery, temporary, tentative, ticklish, top-heavy, tottering,
   tottery, treacherous, tumbledown, unaccountable, unbalanced,
   uncertain, uncontrolled, undependable, undisciplined, unequable,
   unequal, uneven, unfaithworthy, unfixed, unhealthy, unmethodical,
   unmetrical, unorthodox, unpredictable, unregular, unreliable,
   unrestrained, unrhythmical, unsafe, unsettled, unsolid, unsound,
   unstable, unstable as water, unstaid, unsteadfast, unsubstantial,
   unsure, unsystematic, untrustworthy, ununiform, vacillating,
   vagrant, variable, variegated, variform, various, varying, veering,
   vicissitudinary, vicissitudinous, volatile, wandering, wanton,
   wavering, wavery, wavy, wayward, whimsical, wishy-washy, wobbling,
   wobbly