This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
徏 combines 彳 (movement) with 步 (step/walk), suggesting a meaning related to walking or advancing. The exact historical development is uncertain.
The left side 彳 suggests movement, and the right side 步 means step or walk. Picture a person taking a step forward along a path.
For チョク, imagine a person taking a step forward with a sharp, direct motion: chok! The chok sound cues チョク while the step moves ahead.