Hatred, loath, abhorrence! They all mean the same thing; the emotion which raise the pulse rate and creates a pressure point in your head (we call it stress) which arises on account of the offending behavior of someone, some ego clashes or any other such recent occurrence you may recall(where you thought ‘damn! I hate this person’). Causes maybe diverse but the end result is the same, feeling of disgust, anger and the foremost, fatigue. That’s really true though we don’t usually realize it but we do tire ourselves out with this extra load on our minds along with the routine chores which take up a large chunk of the permanent stack which inversely affects our efficiency and concentration in work due to overloading our brain. So is the reason philosophers call it negativity (it’s mathematically proven). Still we don’t do much to curb it and the irony is, the concerned people are not even aware that they are causing us this much discomfort(as a matter of fact, even if they