不食烟火
bù​shí​yān​huǒ

not eating cooked food

不食烟火 不食煙火 bù​shí​yān​huǒ
not eating cooked food
to abstain from cooked food, living on fruits or raw food, as part of Taoist practice or to seek immortality
ethereal
(of a person) having an otherworldly, saintly, or refined quality; detached from the mundane world (often used in the phrase 不食人间烟火 bù​shí​rén​jiān​yān​huǒ)