Passivize is a verb that means to render someone or something inactive or passive. Antonyms for this word would be words that mean the opposite, that is, to make someone or something active, lively or energized. These antonyms include words like activate, animate, enliven, excite, stimulate, energize, galvanize or empower. For instance, instead of passivizing someone, you can activate them to take charge of their life. Instead of passivizing a team, you can energize them to take on new challenges, or you can stimulate their creativity to come up with innovative solutions. In summary, antonyms for passivize are words that encourage activity and engagement.