Unsupported by other people.

synonyms: unassisted, unbacked.

Roget 706: hindering etc. v.; obstructive, obstruent^†; impeditive^†, impedient^†; intercipient^†; prophylactic etc. (remedial) 662; impedimentary.    in the way of, unfavorable; onerous, burdensome; cumbrous, cumbersome; obtrusive.    hindered etc. v.; windbound^†, waterlogged, heavy laden; hard pressed.    unassisted etc. (assist) etc. 707; single-handed, alone; deserted etc. 624.    ... show more

Roget 87: one, sole, single, solitary, unitary; individual, apart, alone; kithless^†.    unaccompanied, unattended; solus [Lat.], single-handed; singular, odd, unique, unrepeated^†, azygous, first and last; isolated etc. (disjoined) 44; insular.    monospermous^†; unific^†, uniflorous^†, unifoliate^†, unigenital^†, uniliteral^†, unijocular^†, unimodal [Math.], unimodular^†.    lone, lonely, lonesome; desolate, dreary.    insecable^†, inseverable^†, indiscerptible^†; compact, indivisible, atomic, irresolvable^†.    ... show more

Without help from others.

Without assistance:
— I built this house single-handedly.

synonym: single-handedly.

Roget 705: easily etc. adj.; readily, smoothly, swimmingly, on easy terms, single-handed.