- Alternative spelling of ardor
- 1818, [Mary Shelley], chapter VI, in Frankenstein; or, The Modern Prometheus. In Three Volumes, volume III, London: Printed [by Macdonald and Son] for Lackington, Hughes, Harding, Mavor, & Jones, OCLC 830979744 ↗, [https://babel.hathitrust.org/cgi/pt?id=emu.010001278703;view=1up;seq=128 page 120]:
- I rushed towards her, and embraced her with ardour; but the deathly languor and coldness of the limbs told me, that what I now held in my arms had ceased to be the Elizabeth whom I had loved and cherished.
- 1931, H. P. Lovecraft, The Whisperer in Darkness, chapter 6:
- The purpose of my visit, and the frightful abnormalities it postulated struck at me all at once with a chill sensation that nearly over-balanced my ardour for strange delvings.