The act or process of defusing; the removal of a fuse or the reduction of tension or danger in a situation.
From 'defuse' plus '-ion,' a suffix from Latin that creates abstract nouns. The -ion suffix typically marks formal or technical nouns derived from verbs.
Words ending in -ion often feel more formal and technical than their -ing counterparts—'defusion' sounds more official than 'defusing,' which is why military and diplomatic language prefers these Latinate noun forms.
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