hallucinate
/həˈluːsɪneɪt/verb
no obj.
1- experience a seemingly real perception of something not actually present, typically as a result of a mental disorder or of taking drugs（尤指由于精神错乱或吸毒而）产生幻觉：
they thought he was seeing things, hallucinating.
他们认为他在幻觉中看见了什么。
1.1
- with obj. experience a hallucination of (something)出现（或产生）…的幻觉。
派生词
Hallucinant
adjective & nounhallucinator
noun词源
mid 17th cent. （in the sense 'be deceived， have illusions'）： from Latin hallucinat- 'gone astray in thought'， from the verb hallucinari, from Greek alussein 'be uneasy or distraught'.