indisposed

uneager, unenthusiastic

averse, unwilling

ambivalent, conflicted, doubtful, faltering, halting, indecisive, infirm, irresolute, questioning, skeptical, uncertain, undecided, unsure, vacillating, wobbly (also wabbly)

fainthearted, shy, timid

lousy, sickish

nauseated, nauseous, qualmish, queasy (also queazy), squeamish

airsick, carsick, seasick

dizzy, light-headed, shaky, woozy

achy, feverish

diseased, disordered

decrepit, feeble, fragile, frail, infirm, invalid, sickly, weak, weakly

afflicted, troubled

challenged, debilitated, disabled, halt, incapacitated, lame

hypochondriac, hypochondriacal