This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 踑 is uncertain. It combines 足 (foot) with 其, but the original semantic and phonetic roles are unclear.
The left side is 足 (foot), and the right side is 其. Imagine a foot leaving a distinctive mark, like a footprint, but the exact meaning is uncertain.
For キ, imagine a key (キー) unlocking the mystery of this rare kanji: key -> キ, and the foot (足) steps toward understanding.