知 is a Chinese hanzi, listed here under the keyword “know”. It is built from 矢 (arrow) and 口 (mouth). It appears as a component in 8 other characters in this index.
On KumiJi Glyph Explorer, open the parts search and type “arrow” + “mouth”. 知 is among the results, together with every other character containing the same shapes.
Open 知 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.