v. t.
n. Action in opposition; hindrance resistance. [ 1913 Webster ]
[ They ] do not . . . overcome the counteraction of a false principle or of stubborn partiality. Johnson. [ 1913 Webster ]
a. Tending to counteract. [ 1913 Webster ]
n. One who, or that which, counteracts. [ 1913 Webster ]
adv. By counteraction. [ 1913 Webster ]