ful ‧ mi ‧ nate /ˈfʊlməneɪt, ˈfʊlmɪneɪt, ˈfʌl-/ BrE AmE verb [intransitive] formal
[ Date: 1400-1500 ; Language: Latin ; Origin: fulminare 'to hit with lightning' , from fulmen 'lightning' ]
to criticize someone or something angrily
fulminate at/against/about
Mick was fulminating against the unfairness of it all.
—fulmination /ˌfʊlməˈneɪʃ ə n, ˌfʊlmɪˈneɪʃ ə n, ˌfʌl-/ noun [uncountable and countable]