兟 is a Chinese hanzi, listed here under the keyword “to advance”. It is built from 先 (first) and 先 (first). It appears as a component in 2 other characters in this index.
On KumiJi Glyph Explorer, open the parts search and type “first” + “first”. 兟 is among the results, together with every other character containing the same shapes.
Open 兟 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.