fainting
faint-ing
noun
A sudden, temporary loss of consciousness, often due to insufficient blood flow.
"She had a sudden fainting spell."
verb
Losing consciousness temporarily, often due to a sudden drop in blood pressure.
"He felt himself fainting."
Thesaurus
Synonyms: faint, weak, perceptible, swoon, conk, pass out, syncope, deliquium, fainthearted, fearful, cowardly, faint-hearted