unbacked
/ˌʌnˈbækt/adjective
1
- having no financial, material, or moral support无助的; 无支持的; 无后台的。
2
- (of a horse) having no backers in a race（赛马）无人押注的。
3
- having no backing layer无加固层的; 无底布的：
unbacked hessian.
无加固层的黄麻布。