夙 is a Chinese hanzi, listed here under the keyword “early in morning”. It is built from 几 (small table) and 歹 (bad). It appears as a component in 2 other characters in this index.
On KumiJi Glyph Explorer, open the parts search and type “small table” + “bad”. 夙 is among the results, together with every other character containing the same shapes.
Open 夙 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.