coma

https://doi.org/10.1351/goldbook.11685
State of profound unconsciousness lasting more than several hours in which one cannot respond to stimuli and from which one cannot be roused.
Source:
PAC, 2015, 87, 841. (IUPAC Glossary of terms used in neurotoxicology (IUPAC Recommendations 2015)) on page 858 [Terms] [Paper]