Not essayed; not attempted; not subjected to assay or trial; untested.
The Century Dictionary (Public Domain)
Use "unassayed" in a sentence
"But here, as we are about to attempt a description hitherto unassayed either in prose or verse, we think proper to invoke the assistance of certain aerial beings, who will, we doubt not, come kindly to our aid on this occasion."
"Mother was almost equally bulky, with an unassayed number of garments, but over them all she wore a still respectable Raglan town coat."
"But here, as we are about to attempt a description hitherto unassayed either in prose or verse, we think proper to invoke the assistance of certain aërial beings, who will, we doubt not, come kindly to our aid on this occasion."