If you hallucinate, you see things that are not really there, either because you are ill or because you have taken a drug.
例句
Hunger made him hallucinate.饥饿使他产生了幻觉。If you stared long enough and hard, you could even begin to hallucinate the appearance of small islands.如果长时间目不转睛地盯着看，你甚至会产生幻觉，看到一些小岛的出现。