坚 is a simplified Chinese hanzi, listed here under the keyword “hard”. It is built from 又 (and) and 土 (soil). It appears as a component in 3 other characters in this index.
On KumiJi Glyph Explorer, open the parts search and type “and” + “soil”. 坚 is among the results, together with every other character containing the same shapes.
Open 坚 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.