dislike — to regard with displeasure, antipathy, or aversion: I dislike working. I dislike oysters.
hard feelings — Hard feelings are feelings of anger or bitterness towards someone who you have had an argument with or who has upset you. If you say 'no hard feelings', you are making an agreement with someone not to be angry or bitter about something.
ill-disposed — unfriendly, unsympathetic, or having a negative attitude, as toward another person or an idea.
malevolence — the quality, state, or feeling of being malevolent; ill will; malice; hatred.
malice — desire to inflict injury, harm, or suffering on another, either because of a hostile impulse or out of deep-seated meanness: the malice and spite of a lifelong enemy.
odium — intense hatred or dislike, especially toward a person or thing regarded as contemptible, despicable, or repugnant.
unfriendly — not amicable; not friendly or kindly in disposition; unsympathetic; aloof: an unfriendly coldness of manner.
venom — the poisonous fluid that some animals, as certain snakes and spiders, secrete and introduce into the bodies of their victims by biting, stinging, etc.