feign
You are probably looking for feign.
The word fain is a mostly archaic adverb meaning "gladly" or "happily," and was also used as an adjective meaning "preferable."Example:"He would fain lose a fortune rather than disappoint a female acquaintance."
spell check your answer anyone
"Fain would I dwell on form, fain, fain deny what I have spoke" The word you are looking for is "fain".
There is no anagram. The longest words are fain and naif. Others are inn, fan, fin, if, in, an, and a.
The anagram is the archaic "fainer" (more preferably, from fain meaning willingly or preferably).
Johnny Fain's birth name is John Fain.
Ferris Fain's birth name is Ferris Roy Fain.
Fain-lès-Moutiers's population is 190.
David Fain was born in 1970.
Ferris Fain is 5' 11".
Kyle Fain is 5' 7".