启 is a simplified Chinese hanzi, listed here under the keyword “open”. It is built from 户 (door) and 口 (mouth). It appears as a component in 1 other character in this index.
On KumiJi Glyph Explorer, open the parts search and type “door” + “mouth”. 启 is among the results, together with every other character containing the same shapes.
Open 启 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.