single-handed

from WordNet (r) 3.0 (2006)

single-handed
    adv 1: without assistance; "I built this house single-handedly"
           [syn: {single-handed}, {single-handedly}]
    adj 1: unsupported by other people [syn: {single-handed},
           {unassisted}, {unbacked}]
    2: without help from others; "a single-handed accomplishment"

from The Collaborative International Dictionary of English v.0.48

single-handed \sin"gle-hand"ed\, a.
   Having but one hand, or one workman; also, alone; unassisted.
   [1913 Webster]