Wiktionary
firy
a. (obsolete form of fiery English)
Usage examples of "firy".
And therefore the Stoicks could not but think that the firy Principle would wear out all the rest, and at last make an end of the World, which notwithstanding without such a lingering period the Creator may effect at his Pleasure: and to make an end of all things on Earth, and our Planetical System of the World, he need but put out the Sun.
When she took his wrist to check his pulse, she saw it was covered with firy red spots.