Wiktionary
unhysterical
a. Not hysterical.
Usage examples of "unhysterical".
The social world he looked at did not show him heroes, only here and there a plain good soul to whom he was affectionate in the unhysterical way of an English father patting a son on the head.
He returned the stare with interest, then suddenly resumed his air of being the only unhysterical person in the room.
If the convulsions of 1789-1794 were due to the revolutionary doctrine, if that doctrine was the poison of the movement, how would he explain the firm, manly, steadfast, unhysterical quality of the American Revolution thirteen years before?
I let her push me into a chair and fixed Tom with what I intended to be a firm, unhysterical look.