~と(が)相まって => combining / together with… N1
Attached
に相違ない => without a doubt; certain; sure N2
が => Clause1, but/however Clause 2 , Used to show a contradiction or opposite N5
Particles
に[相違「そうい」]ない => No doubt N2
Information, Report
と[相「あい」]まって => Along with A N1
Lists, examples