paroxysm

疾病症状(如咳嗽、癫痫)的突然发作；病情加重期。

A period (especially one of several recurring periods) during the course of an illness when symptoms worsen; a sudden attack of a disease symptom, such as a bout of coughing or a seizure.

(活动、情感等的)突然爆发；高潮部分。

Chiefly followed by of: a sudden outburst of violent activity or feeling; also, the most severe part of an activity or incident; the climax.

(地震、雷暴、火山喷发等)自然现象的剧烈发生；尤指火山喷发系列中最剧烈的部分。

A violent occurrence of a natural phenomenon, such as an earthquake, thunderstorm, or volcanic eruption; specifically (volcanology), the most explosive event during a series of volcanic eruptions.