(manner) Firmly, vigorously, with strength or exertion.
(manner) Harshly, severely; in a hard manner.
I can't really deal hardly with people.
With difficulty.
(degree) Barely, only just, almost not.
they hardly ever watch television; I hardly think they'll come in this bad weather; it's hardly possible he could lose the election.
Not really.
I think the Beatles are a really overrated band. ― Hardly!