Swayr or Swear: How To spell?

The word Swayr is misspelled against Swear, a verb meaning "To affirm or utter a solemn declaration, with an appeal to God for the truth of what is affirmed; to make a promise, threat, or resolve on oath; also, to affirm solemnly by some sacred object, or one regarded as sacred, as the Bible, the Koran, etc."