IPA: /æˌsfɪkˈsiːeɪʃən/
KK: /æsfɪkʃiˈeɪʃən/
A condition where someone cannot breathe properly because there is not enough oxygen, which can lead to serious health problems or death.
The firefighters were trained to recognize the signs of asphyxiation in smoke-filled rooms.
Asphyxiation is formed from "a-" (meaning without) and "sphyx" (from Greek "sphyxis", meaning pulse or to choke) and the suffix "-ation" (indicating a process or action). The word describes the process of being without a pulse due to choking or lack of air.
Think of being 'without' air ('a-') and the feeling of 'choking' ('sphyx') — that's what asphyxiation means.