This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
妷 combines 女 (woman) with 失, but the historical origin and original meaning are uncertain. It may have been a variant or a character used in names.
A woman 女 beside 失 (loss) could suggest a lost woman, but the true meaning is uncertain.
For テツ, imagine a woman named Tetsu who is lost: Tetsu -> テツ, and she stands beside the loss component 失.