脅 is a traditional Chinese hanzi, listed here under the keyword “ribs”. It is built from 劦 ((variant of 協) cooperate) and 月 (moon). It appears as a component in 4 other characters in this index.
On KumiJi Glyph Explorer, open the parts search and type “(variant of 協) cooperate” + “moon”. 脅 is among the results, together with every other character containing the same shapes.
Open 脅 in the interactive kanji search
to expand every part down to its smallest pieces, add your own names and mnemonic stories,
or search for other characters by their parts.