A very useful but rarely used word.
Verve is excitable energy as in to be fevered. Perfervid borders on manic.
The out-of-control antics of anti-Trumpers are perfervid. More internalized perfervidity is experienced as high anxiety: being in love; being excited about President Trump’s presidency; excessive fretting over some significant event about to occur.
A really wonderful word.
thanks! A++++