neglect, pretermission, slight, ignore, cold-shoulder, discount, dismiss, brush aside, snub, cut, more...

regard, consideration, attention, esteem, appreciation

ignorance, neglect, indifference, apathy, disrespect, contempt, disdain, disregardfulness, more...

total, utter, complete, reckless, such, callous, flagrant, blatant, general, apparent, wanton

to not care,   to ignore,   not consider,   not care about,   make irrelevant,   ignore, in a way,   no regard,   don't care about,   lack of regard,   ignore the alarm