[禁止「きんし」] => Don't do N4
Can, Should, Must
[関「かん」]して => About A, With relation to A N3
Considering, Concerning
を[機「き」]に => Use A as an opportunity N1
Time, Situation
を[契機「けいき」] => As a good opportunity A, (do) B N2
Information, Report
を[禁「きん」]じ[得「え」]ない => Can't help but do A, can't hold back from A (emotional response to something) N1
Will, Decision, Doing