Breakdown

crise de nerfs

((sudden) worsening of mental stability; an instance of this)

crise nerveuse

((sudden) worsening of mental stability; an instance of this)

dégradation

(breaking of chemical bonds within a compound; an instance of this)

détail

(detailed categorization, or itemization or listing, of the components of a thing; an instance of this)

panne

(failure, particularly one which is mechanical in nature)