What does the prefix im- mean in the word impartial

Read the excerpt from the odyssey; 'o cyclops! would you feast on my companions? puny am i, in a caveman's hands? how do you like the beating that we gave you, you d(arn)ed cannibal? eater of guests under your roof! zeus and the gods have paid you! ' according to this excerpt, odysseus (a)is fearful of the cyclops. (b)is prideful and overly confident. (c)has been weakened by the cyclops. (d)has regrets about staying on the island.