Flaten or Flatten: How To spell?

The word Flaten is misspelled against Flatten, an adjective meaning "To lower the pitch of; to cause to sound less sharp; to let fall from the pitch."

Flatten has double "tt" is mispronounced as "t"
Remember double 'TT' in between the strings fla & en which should not be misspelled with single 'T'
Wrong Spelling: fla-t-en
Correct Spelling: fla-tt-en
Explore spell check of Flatten to spell without errors.