Wiktionary
a. Not hardened; still soft.
WordNet
adj. not brought to a proper consistency or hardness; "untempered mortar"; "untempered steel" [syn: untempered] [ant: tempered]
Usage examples of "unhardened".
The robot, with one whole arm and shoulder now buried in the creeping embrace of Lancelot, was flung completely across the room, smashing unhardened civilian instruments at the end of its trajectory.
It was difficult enough for Oniko to get around on a level surface, with her muscles still unhardened to the full crush of Earth.
Another executive, but one with an attitude as yet unhardened by the vicissitudes of business life.
The soldier finished ramming the unhardened point into the soft earth at the base of the pit, flicked the stake to make sure that it was firmly seated, then moved on to the next pit, dragging his bundle of stakes with him.