This is the 8348th most frequent Catalan word.
desmaio
"Desmaio" in Catalan means "fainting" or "loss of consciousness."
Here, 'desmaio' is used as a noun referring to a medical condition of fainting.
Va tenir un desmaio al mig del carrer.
He had a fainting spell in the middle of the street.
In this sentence, 'desmaio' is conjugated in the first person singular as an action of fainting.
Em desmaio sovint quan no menjo bé.
I often faint when I don't eat well.
The term 'desmaiat' here is derived from 'desmaio', used figuratively to express being impacted strongly.