Collins Chinese Dictionary Plus (3rd edition), 2011:
呓(囈)
yì 名
1
(=梦话)
- 梦(夢)呓(囈) mèngyì talking in one's sleep
2
(=胡话) ravings (pl )
呓(囈)语(語) yìyǔ 名
- 他睡觉(覺)时(時)常说(說)呓(囈)语(語)。 Tā shuìjiào shí cháng shuō yìyǔ. He often talks in his sleep.