kept one cool (verb) keep one's cool: remain calm
Sinonime: appropriate, called for, compulsatory, compulsory, condign, demanded, deserved, due, enforced, essential, imperative, imperious, indispensable, just, mandatory, needed, needful, obligatory, prerequisite, prescribed, recommended,
requisite, right, rightful, set, suitable, unavoidable, vital
Antonime: inessential, optional