Wiktionary
vb. (context transitive English) To undo or impede the help of.
Usage examples of "unhelp".
There is a distinction to be made: if it is a quality, some quality of some substance, then light, equally with other qualities, will need a body in which to lodge: if, on the contrary, it is an activity rising from something else, we can surely conceive it existing, though there be no neighbouring body but, if that is possible, a blank void which it will overleap and so appear on the further side: it is powerful, and may very well pass over unhelped.
It was an awkward performance, I suppose unhelped by my doubts about my own sanity.
The women were working frantically, unhelped by totally unmanageable children.
Even at best she was an insecure vessel of life-force, maladapted, unhelped by her transsexual conversion.