The opposite of "wast realized" can be expressed in many ways, depending on the context. If one had an unfulfilled goal, dream or aspiration, then the opposite might be to have achieved or accomplished it. Alternatively, if something was not acknowledged or recognized, it's opposite could be to be recognized or be given attention. Another antonym could be to conserve, economize or spare resources, rather than using them up in excess. Furthermore, if something was not utilized or put to good use, or was mismanaged, its opposite might be to make proper use of or make the most out of a situation. Therefore, the opposite of "wast realized" depends on the context and nature of what is being referred to.