“使不再抱幻想”可以翻译为 “disillusion someone (from something)” 或者 “make someone stop having illusions (about something)” 。
例如：
The harsh reality disillusioned him from his unrealistic dreams.（残酷的现实使他对不切实际的梦想不再抱幻想 。）
This failure made her stop having illusions about a quick and easy success.（这次失败使她对快速轻松取得成功不再抱幻想 。）