Unbacked

an unbacked bench

The warlike Wench amongst the Greekes doth stand Vnbackt by Troy, left of her Damsels all, The battery of a thousand swords she bides, Till her yron plates are hew’d off from her sides.

The simple statement, unbacked by any proof but the weight of Ralph’s new authority, brought light and happiness.

This was an intellectual decision, unbacked by moral energy.

an unbacked racehorse

a largely unbacked fundraising project

[…] like unback’d colts, they prick’d their ears, Advanced their eyelids, lifted up their noses As they smelt music:

[…] a well wayed horse will safely convay thee to thy journeys end, when an unbackt Filly may by chance give thee a fall:

[…] whoever has seen a fine arabian war-horse, unback’d and at liberty, and in a wanton trot, cannot but remember what a large waving line his rising, and at the same time pressing forward, cuts through the air;

1823, Mary Shelley, Valperga, London: G. and W.B. Whittaker, Volume 2, Chapter 10, p. 237, […] having visited his charger which was to be led unbacked to the field, he mounted a black palfrey;