asphyxiant

詳細解釋：

as.phyx.i.ant

adj.（形容詞）
Inducing or tending to induce asphyxia.
窒息性的：導致或有可能導致窒息
n.（名詞）
A substance, such as a toxic gas, or an event, such as drowning, that induces asphyxia.
窒息劑，窒息原因：導致窒息的物質，如有毒氣體，或一事件，如溺水