grăvātim, adv. [gravo],
with difficulty , unwillingly (very rare for the usual gravate): cadere, Lucr. 3, 387: haud gravatim socia arma Rutulis junxit, Liv. 1, 2, 3.
gravātim adv. gravatus, reluctantly, unwillingly : socia arma Rutulis iunxit, L. ...
An Elementary Latin Dictionary