This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
踄 combines 足 (foot) with 步 (step/walk), suggesting a meaning related to walking or stepping. The exact historical development is uncertain.
The left side is 足 (foot) and the right side is 步 (step). Picture a foot taking a step, but the overall meaning remains unclear.
For ハク, imagine a foot stepping onto a hack (a cut or notch) in the ground: hack -> ハク, though the kanji's meaning is uncertain.