specific

Amongst us a simpleton, possessed by the demon of hate or cupidity, who has an enemy to destroy, or some near relation to dispose of, goes straight to the grocer’s or druggist’s, gives a false name, which leads more easily to his detection than his real one, and under the pretext that the rats prevent him from sleeping, purchases five or six grammes of arsenic—if he is really a cunning fellow, he goes to five or six different druggists or grocers, and thereby becomes only five or six times more easily traced;—then, when he has acquired his specific, he administers duly to his enemy, or near kinsman, a dose of arsenic which would make a mammoth or mastodon burst, and which, without rhyme or reason, makes his victim utter groans which alarm the entire neighborhood.

“They are indeed exquisite,” he said; “but as they are necessarily submitted to the process of deglutition—a function which it is frequently impossible for a fainting person to accomplish—I prefer my own specific.”

The staff had not opened that specific locker for twenty years.

First, pay close attention to the specific vocabulary and tone that the reviewer uses.