闕 is a traditional Chinese hanzi, listed here under the keyword “watch tower”. It is built from 門 (gate) and 欮 (to hiccough). It appears as a component in 1 other character in this index.
On KumiJi Glyph Explorer, open the parts search and type “gate” + “to hiccough”. 闕 is among the results, together with every other character containing the same shapes.
Open 闕 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.