"half Divine, half human."All human, All divine. Or, to clarify, human body and intellect with a divine soul/spirit, sinless in every respect, yet tempted in all points as we are.
The Lord inherited hereditary evil from His mother. This corresponded to the hells that he had to battle within himself. He had to battle these hells in this corresponding way to save the human race from the hells chocking off heaven and the spiritual world.
He was not Divine Human until after the Glorification.