The correct spelling of the word "hast flash" is actually "hot flash". Phonetically, this is transcribed as /hɑt flæʃ/. The "o" sound replaces the "a" in "hast", and the "t" at the end of "hot" is pronounced strongly. A hot flash is a common symptom experienced during menopause, characterized by a sudden feeling of warmth that spreads throughout the body, typically accompanied by sweating and a rapid heartbeat. It can last for a few seconds to several minutes.