Wiktionary
ultrastable
a. Very stable alt. Very stable
Usage examples of "ultrastable".
He had been analyzed himself, analyzed and passed upon as a granite-willed, ultrastable outsidertough enough to weather the basilisk gaze of a fixation, walk unscathed amidst the chimaerae of perversions, force dark Mother Medusa to close her eyes before the caducous of his art.